Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified
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3 Months Ended |
12 Months Ended |
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Quarterly Financial Data [Abstract] |
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Net premiums earned |
$ 126,075us-gaap_PremiumsEarnedNet |
$ 129,463us-gaap_PremiumsEarnedNet |
$ 124,825us-gaap_PremiumsEarnedNet |
$ 126,273us-gaap_PremiumsEarnedNet |
$ 148,267us-gaap_PremiumsEarnedNet |
$ 135,360us-gaap_PremiumsEarnedNet |
$ 142,933us-gaap_PremiumsEarnedNet |
$ 126,853us-gaap_PremiumsEarnedNet |
$ 506,636us-gaap_PremiumsEarnedNet |
$ 553,413us-gaap_PremiumsEarnedNet |
$ 566,496us-gaap_PremiumsEarnedNet |
Net investment income (expense) |
16,561us-gaap_InvestmentIncomeNet |
17,523us-gaap_InvestmentIncomeNet |
17,645us-gaap_InvestmentIncomeNet |
17,692us-gaap_InvestmentIncomeNet |
17,936us-gaap_InvestmentIncomeNet |
17,758us-gaap_InvestmentIncomeNet |
17,808us-gaap_InvestmentIncomeNet |
18,544us-gaap_InvestmentIncomeNet |
69,421us-gaap_InvestmentIncomeNet |
72,046us-gaap_InvestmentIncomeNet |
99,947us-gaap_InvestmentIncomeNet |
Net realized gains (losses) on investments |
764us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
3,109us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
(596)us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
(515)us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
(778)us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
(306)us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
11,686us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
13,318us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
2,762us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
23,920us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
88,754us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments |
Net losses and LAE |
39,849us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
66,178us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
50,865us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
26,509us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
46,639us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
44,142us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
62,667us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
13,998us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
183,401us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
167,446us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
183,660us-gaap_PolicyholderBenefitsAndClaimsIncurredNet |
Net acquisition expenses |
30,413us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
28,042us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
27,848us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
27,501us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
32,560us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
30,675us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
30,313us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
30,219us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
113,804us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
123,767us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
115,437us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
Operating expenses |
24,985us-gaap_SellingGeneralAndAdministrativeExpense |
18,607us-gaap_SellingGeneralAndAdministrativeExpense |
21,434us-gaap_SellingGeneralAndAdministrativeExpense |
18,283us-gaap_SellingGeneralAndAdministrativeExpense |
23,019us-gaap_SellingGeneralAndAdministrativeExpense |
20,672us-gaap_SellingGeneralAndAdministrativeExpense |
19,718us-gaap_SellingGeneralAndAdministrativeExpense |
19,305us-gaap_SellingGeneralAndAdministrativeExpense |
83,309us-gaap_SellingGeneralAndAdministrativeExpense |
82,714us-gaap_SellingGeneralAndAdministrativeExpense |
80,453us-gaap_SellingGeneralAndAdministrativeExpense |
Net income (loss) |
$ 35,728us-gaap_NetIncomeLoss |
$ 29,125us-gaap_NetIncomeLoss |
$ 36,180us-gaap_NetIncomeLoss |
$ 63,735us-gaap_NetIncomeLoss |
$ 48,623us-gaap_NetIncomeLoss |
$ 38,285us-gaap_NetIncomeLoss |
$ 49,854us-gaap_NetIncomeLoss |
$ 86,516us-gaap_NetIncomeLoss |
$ 164,768us-gaap_NetIncomeLoss |
$ 223,278us-gaap_NetIncomeLoss |
$ 327,228us-gaap_NetIncomeLoss |
Earnings (Loss) Per Common Share [Abstract] |
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Basic (in dollars per share) |
$ 1.44us-gaap_EarningsPerShareBasic |
$ 1.13us-gaap_EarningsPerShareBasic |
$ 1.36us-gaap_EarningsPerShareBasic |
$ 2.30us-gaap_EarningsPerShareBasic |
$ 1.73us-gaap_EarningsPerShareBasic |
$ 1.34us-gaap_EarningsPerShareBasic |
$ 1.63us-gaap_EarningsPerShareBasic |
$ 2.67us-gaap_EarningsPerShareBasic |
$ 6.28us-gaap_EarningsPerShareBasic |
$ 7.46us-gaap_EarningsPerShareBasic |
$ 9.67us-gaap_EarningsPerShareBasic |
Diluted (in dollars per share) |
$ 1.42us-gaap_EarningsPerShareDiluted |
$ 1.12us-gaap_EarningsPerShareDiluted |
$ 1.34us-gaap_EarningsPerShareDiluted |
$ 2.27us-gaap_EarningsPerShareDiluted |
$ 1.71us-gaap_EarningsPerShareDiluted |
$ 1.32us-gaap_EarningsPerShareDiluted |
$ 1.61us-gaap_EarningsPerShareDiluted |
$ 2.63us-gaap_EarningsPerShareDiluted |
$ 6.21us-gaap_EarningsPerShareDiluted |
$ 7.35us-gaap_EarningsPerShareDiluted |
$ 9.60us-gaap_EarningsPerShareDiluted |
Average Common Shares Outstanding [Abstract] |
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Basic (in shares) |
24,793us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
25,731us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
26,577us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
27,765us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
28,097us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
28,655us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
30,571us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
32,373us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
26,207us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
29,909us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
33,714us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
Diluted (in shares) |
25,090us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
26,002us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
26,928us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
28,109us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
28,492us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
29,065us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
30,970us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
32,838us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
26,524us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
30,334us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
33,981us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |