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Consolidated Statements of Stockholders' Equity (USD $) In Thousands | Total | Common Stock | Paid-in Capital | Retained Earnings
--- | --- | --- | --- | ---
Balance at Dec. 31, 2011 |  | $ 122,504us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | $ 222us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | $ 0us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | $ 122,282us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Balance (in shares) at Dec. 31, 2011 | [1] |  | 55,391us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Net income |  | 27,449us-gaap_NetIncomeLoss |  |  |  |  | 27,449us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Stock options exercised and restricted stock awards granted, including tax benefits (in shares) | [1] |  | 531us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock options exercised and restricted stock awards granted, including tax benefits |  | 2,389us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation |  |  | 2,387us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] |  |
Share-based compensation |  | 1,294us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  | 1,294us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] |  |
Stock repurchased and retired (in shares) | [1] |  | (756)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock repurchased and retired |  | (6,660)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | (3)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | (3,681)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | (2,976)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Dividends |  | (8,840)us-gaap_DividendsCommonStockCash |  |  | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | (8,840)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Balance at Dec. 31, 2012 |  | 138,136us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 221us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | 0us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | 137,915us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Balance (in shares) at Dec. 31, 2012 | [1] |  | 55,166us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Net income |  | 37,547us-gaap_NetIncomeLoss |  |  |  |  | 37,547us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Stock options exercised and restricted stock awards granted, including tax benefits (in shares) | [1] |  | 435us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock options exercised and restricted stock awards granted, including tax benefits |  | 2,310us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 2us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | 2,308us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] |  |
Share-based compensation |  | 1,763us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  | 1,763us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] |  |
Stock repurchased and retired (in shares) | [1] |  | (534)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock repurchased and retired |  | (8,222)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | (2)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | (4,071)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | (4,149)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Dividends | [2] | (7,428)us-gaap_DividendsCommonStockCash |  |  | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | (7,428)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Balance at Dec. 31, 2013 |  | 164,106us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 221us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | 0us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | 163,885us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Balance (in shares) at Dec. 31, 2013 | [1] |  | 55,067us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Net income |  | 44,158us-gaap_NetIncomeLoss |  |  |  |  | 44,158us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Stock options exercised and restricted stock awards granted, including tax benefits (in shares) | [1] |  | 463us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock options exercised and restricted stock awards granted, including tax benefits |  | 2,557us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 1us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | 2,556us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] |  |
Share-based compensation |  | 2,178us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  | 2,178us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] |  |
Stock repurchased and retired (in shares) | [1] |  | (1,488)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Stock repurchased and retired |  | (29,284)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | (6)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | (4,734)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | (24,544)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Dividends | [2] | (9,656)us-gaap_DividendsCommonStockCash |  |  | 0us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | (9,656)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Balance at Dec. 31, 2014 |  | $ 174,059us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | $ 216us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | [1] | $ 0us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | [1] | $ 173,843us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | [1]
Balance (in shares) at Dec. 31, 2014 | [1] |  | 54,042us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
[1] | Reflects three-for-two stock split effective July 16, 2014
[2] | Includes cash payment of fractional shares from three-for-two stock splits effective July 16, 2014 and July 2, 2013

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