| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.7.0.1 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 108 </ContextCount> |
| <ElementCount> 273 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> false </FootnotesReported> |
| <SegmentCount> 51 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 13 </UnitCount> |
| <MyReports> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 0001000 - Document - Document and Entity Information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/DocumentAndEntityInformation </Role> |
| | | <ShortName> Document and Entity Information </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 1001000 - Statement - Consolidated Balance Sheets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ConsolidatedBalanceSheets </Role> |
| | | <ShortName> Consolidated Balance Sheets </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ConsolidatedBalanceSheetsParenthetical </Role> |
| | | <ShortName> Consolidated Balance Sheets (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 1002000 - Statement - Consolidated Statements of Operations </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ConsolidatedStatementsOfOperations </Role> |
| | | <ShortName> Consolidated Statements of Operations </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 1003000 - Statement - Consolidated Statements of Comprehensive (Loss) Income </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ConsolidatedStatementsOfComprehensiveLossIncome </Role> |
| | | <ShortName> Consolidated Statements of Comprehensive (Loss) Income </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 1004000 - Statement - Consolidated Statement of Changes in Equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ConsolidatedStatementOfChangesInEquity </Role> |
| | | <ShortName> Consolidated Statement of Changes in Equity </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 1005000 - Statement - Consolidated Statements of Cash Flows </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ConsolidatedStatementsOfCashFlows </Role> |
| | | <ShortName> Consolidated Statements of Cash Flows </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 2101100 - Disclosure - BASIS OF PRESENTATION AND ORGANIZATION </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/BasisOfPresentationAndOrganization </Role> |
| | | <ShortName> BASIS OF PRESENTATION AND ORGANIZATION </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 2102100 - Disclosure - INITIAL PUBLIC OFFERING </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/InitialPublicOffering </Role> |
| | | <ShortName> INITIAL PUBLIC OFFERING </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 2103100 - Disclosure - CASH </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/Cash </Role> |
| | | <ShortName> CASH </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 2104100 - Disclosure - ACCOUNTS RECEIVABLE </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/AccountsReceivable </Role> |
| | | <ShortName> ACCOUNTS RECEIVABLE </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 2105100 - Disclosure - FAIR VALUE MEASUREMENTS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/FairValueMeasurements </Role> |
| | | <ShortName> FAIR VALUE MEASUREMENTS </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 2106100 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/AccruedExpensesAndOtherCurrentLiabilities </Role> |
| | | <ShortName> ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 2107100 - Disclosure - VARIABLE INTEREST ENTITIES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/VariableInterestEntities </Role> |
| | | <ShortName> VARIABLE INTEREST ENTITIES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 2108100 - Disclosure - NONCONTROLLING INTERESTS SUBJECT TO PUT PROVISIONS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/NoncontrollingInterestsSubjectToPutProvisions </Role> |
| | | <ShortName> NONCONTROLLING INTERESTS SUBJECT TO PUT PROVISIONS </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 2109100 - Disclosure - DEBT </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/Debt </Role> |
| | | <ShortName> DEBT </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 2110100 - Disclosure - INCOME TAXES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/IncomeTaxes </Role> |
| | | <ShortName> INCOME TAXES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 2111100 - Disclosure - STOCK-BASED COMPENSATION </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/StockBasedCompensation </Role> |
| | | <ShortName> STOCK-BASED COMPENSATION </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 2112100 - Disclosure - (LOSS) EARNINGS PER SHARE </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/LossEarningsPerShare </Role> |
| | | <ShortName> (LOSS) EARNINGS PER SHARE </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 2113100 - Disclosure - RELATED PARTY TRANSACTIONS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/RelatedPartyTransactions </Role> |
| | | <ShortName> RELATED PARTY TRANSACTIONS </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 2114100 - Disclosure - COMMITMENTS AND CONTINGENCIES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/CommitmentsAndContingencies </Role> |
| | | <ShortName> COMMITMENTS AND CONTINGENCIES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 2115100 - Disclosure - CERTAIN LEGAL MATTERS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/CertainLegalMatters </Role> |
| | | <ShortName> CERTAIN LEGAL MATTERS </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 2116100 - Disclosure - CHANGES IN OWNERSHIP INTEREST IN CONSOLIDATED SUBSIDIARIES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ChangesInOwnershipInterestInConsolidatedSubsidiaries </Role> |
| | | <ShortName> CHANGES IN OWNERSHIP INTEREST IN CONSOLIDATED SUBSIDIARIES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 2201201 - Disclosure - BASIS OF PRESENTATION AND ORGANIZATION (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/BasisOfPresentationAndOrganizationPolicies </Role> |
| | | <ShortName> BASIS OF PRESENTATION AND ORGANIZATION (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 2303301 - Disclosure - CASH (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/CashTables </Role> |
| | | <ShortName> CASH (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/Cash </ParentRole> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 2305301 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/FairValueMeasurementsTables </Role> |
| | | <ShortName> FAIR VALUE MEASUREMENTS (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/FairValueMeasurements </ParentRole> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 2306301 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables </Role> |
| | | <ShortName> ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/AccruedExpensesAndOtherCurrentLiabilities </ParentRole> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 2309301 - Disclosure - DEBT (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/DebtTables </Role> |
| | | <ShortName> DEBT (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/Debt </ParentRole> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 2311301 - Disclosure - STOCK-BASED COMPENSATION (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/StockBasedCompensationTables </Role> |
| | | <ShortName> STOCK-BASED COMPENSATION (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/StockBasedCompensation </ParentRole> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 2312301 - Disclosure - (LOSS) EARNINGS PER SHARE (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/LossEarningsPerShareTables </Role> |
| | | <ShortName> (LOSS) EARNINGS PER SHARE (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/LossEarningsPerShare </ParentRole> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 2316301 - Disclosure - CHANGES IN OWNERSHIP INTEREST IN CONSOLIDATED SUBSIDIARIES (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ChangesInOwnershipInterestInConsolidatedSubsidiariesTables </Role> |
| | | <ShortName> CHANGES IN OWNERSHIP INTEREST IN CONSOLIDATED SUBSIDIARIES (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/ChangesInOwnershipInterestInConsolidatedSubsidiaries </ParentRole> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 2401402 - Disclosure - BASIS OF PRESENTATION AND ORGANIZATION (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/BasisOfPresentationAndOrganizationDetails </Role> |
| | | <ShortName> BASIS OF PRESENTATION AND ORGANIZATION (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/BasisOfPresentationAndOrganizationPolicies </ParentRole> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 2402401 - Disclosure - INITIAL PUBLIC OFFERING (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/InitialPublicOfferingDetails </Role> |
| | | <ShortName> INITIAL PUBLIC OFFERING (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/InitialPublicOffering </ParentRole> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 2403402 - Disclosure - CASH (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/CashDetails </Role> |
| | | <ShortName> CASH (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/CashTables </ParentRole> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 2404401 - Disclosure - ACCOUNTS RECEIVABLE (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/AccountsReceivableDetails </Role> |
| | | <ShortName> ACCOUNTS RECEIVABLE (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/AccountsReceivable </ParentRole> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 2405402 - Disclosure - FAIR VALUE MEASUREMENTS (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/FairValueMeasurementsDetails </Role> |
| | | <ShortName> FAIR VALUE MEASUREMENTS (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/FairValueMeasurementsTables </ParentRole> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 2405403 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of fair values (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/FairValueMeasurementsScheduleOfFairValuesDetails </Role> |
| | | <ShortName> FAIR VALUE MEASUREMENTS - Schedule of fair values (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 2405404 - Disclosure - FAIR VALUE MEASUREMENTS - Fair value rollforward for tax receivable agreement liability (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/FairValueMeasurementsFairValueRollforwardForTaxReceivableAgreementLiabilityDetails </Role> |
| | | <ShortName> FAIR VALUE MEASUREMENTS - Fair value rollforward for tax receivable agreement liability (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 2406402 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/AccruedExpensesAndOtherCurrentLiabilitiesDetails </Role> |
| | | <ShortName> ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables </ParentRole> |
| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 2407401 - Disclosure - VARIABLE INTEREST ENTITIES (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/VariableInterestEntitiesDetails </Role> |
| | | <ShortName> VARIABLE INTEREST ENTITIES (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/VariableInterestEntities </ParentRole> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 2408401 - Disclosure - NONCONTROLLING INTERESTS SUBJECT TO PUT PROVISIONS (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/NoncontrollingInterestsSubjectToPutProvisionsDetails </Role> |
| | | <ShortName> NONCONTROLLING INTERESTS SUBJECT TO PUT PROVISIONS (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/NoncontrollingInterestsSubjectToPutProvisions </ParentRole> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 2409402 - Disclosure - DEBT - Schedule of long-term debt (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/DebtScheduleOfLongTermDebtDetails </Role> |
| | | <ShortName> DEBT - Schedule of long-term debt (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 2409403 - Disclosure - DEBT - Scheduled maturities of long-term debt (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/DebtScheduledMaturitiesOfLongTermDebtDetails </Role> |
| | | <ShortName> DEBT - Scheduled maturities of long-term debt (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 2409404 - Disclosure - DEBT - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/DebtNarrativeDetails </Role> |
| | | <ShortName> DEBT - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 2410401 - Disclosure - INCOME TAXES (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/IncomeTaxesDetails </Role> |
| | | <ShortName> INCOME TAXES (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/IncomeTaxes </ParentRole> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 2411402 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Expense (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/StockBasedCompensationScheduleOfExpenseDetails </Role> |
| | | <ShortName> STOCK-BASED COMPENSATION - Schedule of Expense (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 46 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 2411403 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/StockBasedCompensationNarrativeDetails </Role> |
| | | <ShortName> STOCK-BASED COMPENSATION - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 47 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 2411404 - Disclosure - STOCK-BASED COMPENSATION - Assumptions used for options granted (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/StockBasedCompensationAssumptionsUsedForOptionsGrantedDetails </Role> |
| | | <ShortName> STOCK-BASED COMPENSATION - Assumptions used for options granted (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 48 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 2411405 - Disclosure - STOCK-BASED COMPENSATION - Option activity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/StockBasedCompensationOptionActivityDetails </Role> |
| | | <ShortName> STOCK-BASED COMPENSATION - Option activity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 49 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 2411406 - Disclosure - STOCK-BASED COMPENSATION - Restricted stock awards (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/StockBasedCompensationRestrictedStockAwardsDetails </Role> |
| | | <ShortName> STOCK-BASED COMPENSATION - Restricted stock awards (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 50 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 2412402 - Disclosure - (LOSS) EARNINGS PER SHARE (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/LossEarningsPerShareDetails </Role> |
| | | <ShortName> (LOSS) EARNINGS PER SHARE (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/LossEarningsPerShareTables </ParentRole> |
| | | <Position> 51 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 2413401 - Disclosure - RELATED PARTY TRANSACTIONS (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/RelatedPartyTransactionsDetails </Role> |
| | | <ShortName> RELATED PARTY TRANSACTIONS (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/RelatedPartyTransactions </ParentRole> |
| | | <Position> 52 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 2414401 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/CommitmentsAndContingenciesDetails </Role> |
| | | <ShortName> COMMITMENTS AND CONTINGENCIES (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/CommitmentsAndContingencies </ParentRole> |
| | | <Position> 53 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R54.htm </HtmlFileName> |
| | | <LongName> 2415401 - Disclosure - CERTAIN LEGAL MATTERS (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/CertainLegalMattersDetails </Role> |
| | | <ShortName> CERTAIN LEGAL MATTERS (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/CertainLegalMatters </ParentRole> |
| | | <Position> 54 </Position> |
| | | </Report> |
| | <Report instance="ara-20170331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R55.htm </HtmlFileName> |
| | | <LongName> 2416402 - Disclosure - CHANGES IN OWNERSHIP INTEREST IN CONSOLIDATED SUBSIDIARIES (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.americanrenal.com/role/ChangesInOwnershipInterestInConsolidatedSubsidiariesDetails </Role> |
| | | <ShortName> CHANGES IN OWNERSHIP INTEREST IN CONSOLIDATED SUBSIDIARIES (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.americanrenal.com/role/ChangesInOwnershipInterestInConsolidatedSubsidiariesTables </ParentRole> |
| | | <Position> 55 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
| | <File> ara-20170331.xml </File> |
| | <File> ara-20170331.xsd </File> |
| | <File> ara-20170331_cal.xml </File> |
| | <File> ara-20170331_def.xml </File> |
| | <File> ara-20170331_lab.xml </File> |
| | <File> ara-20170331_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies/> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |