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Consolidated Statements Of Shareholders' Equity - 6 months ended Jun. 30, 2016 - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Additional Paid In Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member]
--- | --- | --- | --- | --- | ---
Balances, shares at Dec. 31, 2015 | 50,178 | 50,178 |  |  |
Balances, value at Dec. 31, 2015 | $ 1,321,904 | $ 5,018 | $ 624,997 | $ 704,905 | $ (13,016)
Stock-based compensation expense | $ 3,981 | $ 0 | 3,981 | 0 | 0
Shares repurchased and retired, shares | (1,440) | (1,440) |  |  |
Shares repurchased and retired, value | $ (29,315) | $ (144) | (15,724) | (13,447) | 0
Stock options exercised, shares | 51 | 51 |  |  |
Stock options exercised, value | $ 823 | $ 5 | 818 | 0 | 0
Vesting of restricted stock units, shares | 171 | 171 |  |  |
Vesting of restricted stock units, value | $ 0 | $ 17 | (17) | 0 | 0
Shares withheld for taxes, shares | (25) | (25) |  |  |
Shares withheld for taxes, value | $ (535) | $ (3) | (532) | 0 | 0
Excess tax benefit of stock-based compensation | (111) | 0 | (111) | 0 | 0
Comprehensive income | $ 21,370 | $ 0 | 0 | 23,737 | (2,367)
Balances, shares at Jun. 30, 2016 | 48,935 | 48,935 |  |  |
Balances, value at Jun. 30, 2016 | $ 1,318,117 | $ 4,893 | $ 613,412 | $ 715,195 | $ (15,383)

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