v2.4.1.9

Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings
Beginning balance at Dec. 31, 2011	$ 457,743us-gaap_StockholdersEquity	$ 266us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 47,342us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (21,496)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	$ 431,631us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Beginning balance (shares) at Dec. 31, 2011		26,587,000us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,811us-gaap_NetIncomeLoss				19,811us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Proceeds from exercise of stock options (shares)		11,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Proceeds from exercise of stock options	198us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised		198us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Tax benefit on exercise of stock options	12us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation		12us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Stock-based compensation	746us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition		746us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Dividend declared—$0.08 per share	(1,708)us-gaap_DividendsCommonStockCash				(1,708)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Purchase of treasury stock	(66,638)us-gaap_TreasuryStockValueAcquiredCostMethod			(66,638)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Ending balance at Dec. 31, 2012	410,164us-gaap_StockholdersEquity	266us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	48,298us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(88,134)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	449,734us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending balance (shares) at Dec. 31, 2012		26,598,000us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	46,910us-gaap_NetIncomeLoss				46,910us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Proceeds from exercise of stock options (shares)		34,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Proceeds from exercise of stock options	622us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised		622us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Tax benefit on exercise of stock options	175us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation		175us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Stock-based compensation	364us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition		364us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Dividend declared—$0.08 per share	(1,654)us-gaap_DividendsCommonStockCash				(1,654)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Purchase of treasury stock	0us-gaap_TreasuryStockValueAcquiredCostMethod
Ending balance at Dec. 31, 2013	456,581us-gaap_StockholdersEquity	266us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	49,459us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(88,134)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	494,990us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending balance (shares) at Dec. 31, 2013		26,632,000us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	37,123us-gaap_NetIncomeLoss				37,123us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Proceeds from exercise of stock options (shares)	25,350us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	25,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Proceeds from exercise of stock options	529us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	528us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Tax benefit on exercise of stock options	123us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation		123us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Stock-based compensation	488us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition		488us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Dividend declared—$0.08 per share	(1,657)us-gaap_DividendsCommonStockCash				(1,657)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Purchase of treasury stock	0us-gaap_TreasuryStockValueAcquiredCostMethod
Ending balance at Dec. 31, 2014	$ 493,187us-gaap_StockholdersEquity	$ 267us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	$ 50,598us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (88,134)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember	$ 530,456us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending balance (shares) at Dec. 31, 2014		26,657,000us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember

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Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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

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