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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member] Class A [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss	Retained Earnings [Member]	Total	Class A [Member]
Balance at beginning of period at Dec. 31, 2011	$ 91us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 292,240us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (522,162)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	$ (62,565)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	$ 866,632us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ 574,236us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Stockholders' equity [Roll Forward]
Net income	0us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	221,645us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	221,645us-gaap_NetIncomeLoss
Other comprehensive income, net of tax	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	10,743us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	10,743us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Repurchase of Class A common stock (Note 11)	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(201,471)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(201,471)us-gaap_TreasuryStockValueAcquiredCostMethod	(201,471)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Exercise of employee stock options/vesting of stock awards	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	(4,214)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	8,780us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	4,566us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Excess tax benefit from equity awards	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	7,909us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	7,909us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
Stock-based compensation	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	21,358us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	21,358us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Cash dividends	0us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	(48,374)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(48,374)us-gaap_DividendsCommonStockCash
Balance at end of period at Dec. 31, 2012	91us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	317,293us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(714,853)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	(51,822)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	1,039,903us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	590,612us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Stockholders' equity [Roll Forward]
Net income	0us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	364,888us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	364,888us-gaap_NetIncomeLoss
Other comprehensive income, net of tax	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	5,594us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	5,594us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Repurchase of Class A common stock (Note 11)	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(140,865)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(140,865)us-gaap_TreasuryStockValueAcquiredCostMethod	(140,865)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Exercise of employee stock options/vesting of stock awards	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	5,556us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	28,814us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	34,370us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Excess tax benefit from equity awards	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	41,914us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	41,914us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
Stock-based compensation	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	32,620us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	32,620us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Cash dividends	0us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	(70,514)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(70,514)us-gaap_DividendsCommonStockCash
Balance at end of period at Dec. 31, 2013	91us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	397,383us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(826,904)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	(46,228)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	1,334,277us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	858,619us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Stockholders' equity [Roll Forward]
Net income	0us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	189,176us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	189,176us-gaap_NetIncomeLoss
Other comprehensive income, net of tax	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	(5,293)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(5,293)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Repurchase of Class A common stock (Note 11)	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(45,724)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(45,724)us-gaap_TreasuryStockValueAcquiredCostMethod	(45,724)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Exercise of employee stock options/vesting of stock awards	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	(12,440)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	10,020us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(2,420)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Excess tax benefit from equity awards	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	11,947us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	11,947us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
Stock-based compensation	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	17,504us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	17,504us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Cash dividends	0us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	(81,371)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(81,371)us-gaap_DividendsCommonStockCash
Balance at end of period at Dec. 31, 2014	$ 91us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 414,394us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (862,608)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	$ (51,521)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	$ 1,442,082us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ 942,438us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

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- Definition

Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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