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Consolidated Statements Of Shareholders' Equity - 9 months ended Sep. 30, 2017 - 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, 2016 | 49,330 | 49,330 |  |  |
Balances, value at Dec. 31, 2016 | $ 1,365,465 | $ 4,933 | $ 626,306 | $ 748,402 | $ (14,176)
Stock-based compensation expense | $ 6,819 | $ 0 | 6,819 | 0 | 0
Shares repurchased and retired, shares | (183) | (183) |  |  |
Shares repurchased and retired, value | $ (5,887) | $ (18) | (2,031) | (3,838) | 0
Stock options exercised, shares | 502 | 502 |  |  |
Stock options exercised, value | $ 9,828 | $ 50 | 9,778 | 0 | 0
Vesting of restricted stock units, shares | 185 | 185 |  |  |
Vesting of restricted stock units, value | $ 0 | $ 18 | (18) | 0 | 0
Shares withheld for taxes, shares | (12) | (12) |  |  |
Shares withheld for taxes, value | $ (383) | $ (1) | (382) | 0 | 0
Net income | 44,375 | 0 | 0 | 44,375 | 0
Other comprehensive loss | $ 4,694 | $ 0 | 0 | 0 | 4,694
Balances, shares at Sep. 30, 2017 | 49,822 | 49,822 |  |  |
Balances, value at Sep. 30, 2017 | $ 1,424,911 | $ 4,982 | $ 640,472 | $ 788,939 | $ (9,482)

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