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| | | <ElementDefenition> The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. </ElementDefenition> |
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| </Cells> |
| | | <ElementDataType> xbrli:monetaryItemType </ElementDataType> |
| | | <SimpleDataType> monetary </SimpleDataType> |
| | | <ElementDefenition> Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. </ElementDefenition> |
| | | <ElementReferences> Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 </ElementReferences> |
| | | <IsTotalLabel> false </IsTotalLabel> |
| | | <UnitID> 2 </UnitID> |
| | | <Label> Loss on pension settlement </Label> |
| | | </Row> |
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| | | <Id> 9 </Id> |
| | | <IsAbstractGroupTitle> false </IsAbstractGroupTitle> |
| | | <LabelSeparator> </LabelSeparator> |
| | | <Level> 2 </Level> |
| | | <ElementName> us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost </ElementName> |
| | | <ElementPrefix> us-gaap_ </ElementPrefix> |
| | | <IsBaseElement> true </IsBaseElement> |
| | | <BalanceType> debit </BalanceType> |
| | | <PeriodType> duration </PeriodType> |
| | | <IsReportTitle> false </IsReportTitle> |
| | | <IsSegmentTitle> false </IsSegmentTitle> |
| | | <IsCalendarTitle> false </IsCalendarTitle> |
| | | <IsEquityPrevioslyReportedAsRow> false </IsEquityPrevioslyReportedAsRow> |
| | | <IsEquityAdjustmentRow> false </IsEquityAdjustmentRow> |
| | | <IsBeginningBalance> false </IsBeginningBalance> |
| | | <IsEndingBalance> false </IsEndingBalance> |
| | | <IsReverseSign> false </IsReverseSign> |
| | | <PreferredLabelRole> totalLabel </PreferredLabelRole> |
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| <IsNumeric> true </IsNumeric> |
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| <NumericAmount> 184000 </NumericAmount> |
| <RoundedNumericAmount> 184 </RoundedNumericAmount> |
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| <CurrencyCode> USD </CurrencyCode> |
| <CurrencySymbol> $ </CurrencySymbol> |
| <IsIndependantCurrency> false </IsIndependantCurrency> |
| <ShowCurrencySymbol> true </ShowCurrencySymbol> |
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| </Cell> |
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| <IsNumeric> true </IsNumeric> |
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| <NumericAmount> 582000 </NumericAmount> |
| <RoundedNumericAmount> 582 </RoundedNumericAmount> |
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| <FootnoteIndexer/> |
| <CurrencyCode> USD </CurrencyCode> |
| <CurrencySymbol> $ </CurrencySymbol> |
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| <CurrencyCode> USD </CurrencyCode> |
| <CurrencySymbol> $ </CurrencySymbol> |
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| <ShowCurrencySymbol> true </ShowCurrencySymbol> |
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| <Id> 5 </Id> |
| <IsNumeric> true </IsNumeric> |
| <IsRatio> false </IsRatio> |
| <DisplayZeroAsNone> false </DisplayZeroAsNone> |
| <NumericAmount> 1762000 </NumericAmount> |
| <RoundedNumericAmount> 1762 </RoundedNumericAmount> |
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| <CurrencyCode> USD </CurrencyCode> |
| <CurrencySymbol> $ </CurrencySymbol> |
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| </Cells> |
| | | <ElementDataType> xbrli:monetaryItemType </ElementDataType> |
| | | <SimpleDataType> monetary </SimpleDataType> |
| | | <ElementDefenition> The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. </ElementDefenition> |
| | | <ElementReferences> Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 </ElementReferences> |
| | | <IsTotalLabel> true </IsTotalLabel> |
| | | <UnitID> 2 </UnitID> |
| | | <Label> Net periodic expense </Label> |
| | | </Row> |
| | </Rows> |
| <Footnotes/> |
| <IsEquityReport> false </IsEquityReport> |
| <ReportName> DEFINED BENEFIT PENSION EXPENSE (Details) - Summary of defined benefit pension expense (USD $) </ReportName> |
| <MonetaryRoundingLevel> Thousands </MonetaryRoundingLevel> |
| <SharesRoundingLevel> UnKnown </SharesRoundingLevel> |
| <PerShareRoundingLevel> UnKnown </PerShareRoundingLevel> |
| <ExchangeRateRoundingLevel> UnKnown </ExchangeRateRoundingLevel> |
| <HasCustomUnits> true </HasCustomUnits> |
| <IsEmbedReport> false </IsEmbedReport> |
| <IsMultiCurrency> false </IsMultiCurrency> |
| <ReportType> Sheet </ReportType> |
| <RoleURI> http://griffoncorp.com/role/SummaryofdefinedbenefitpensionexpenseTable </RoleURI> |
| <NumberOfCols> 5 </NumberOfCols> |
| <NumberOfRows> 9 </NumberOfRows> |
| </InstanceReport> |