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v3.19.3.a.u2

Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings (Deficit) [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2016 | $ 134,161 | $ 698 | $ 119,733 | $ 187,242 | $ (173,512)
Beginning Balance, Shares at Dec. 31, 2016 |  | 58,801,104 |  |  | 10,987,362
Net income | 95,128 |  |  | 95,128 |
Employee stock plans | 393 | $ 2 | 391 |  |
Employee stock plans, Shares |  | 33,228 |  |  |
Shares withheld for taxes on awards | (3,619) | $ (2) | (3,617) |  |
Shares withheld for taxes on awards, Shares |  | (58,470) |  |  |
Stock-based compensation | 5,187 |  | 5,187 |  |
Stock-based compensation, Shares |  | 80,998 |  |  |
Ending Balance at Dec. 31, 2017 | 231,250 | $ 698 | 121,694 | 282,370 | $ (173,512)
Ending Balance, Shares at Dec. 31, 2017 |  | 58,856,860 |  |  | 10,987,362
Net income | 134,572 |  |  | 134,572 |
Employee stock plans | 882 | $ 1 | 881 |  |
Employee stock plans, Shares |  | 63,448 |  |  |
Shares withheld for taxes on awards | (4,695) |  | (4,695) |  |
Shares withheld for taxes on awards, Shares |  | (13,028) |  |  |
Stock-based compensation | 6,345 | $ 1 | 6,344 |  |
Stock-based compensation, Shares |  | 103,694 |  |  |
Repurchases of common stock | (25,391) |  |  |  | $ (25,391)
Repurchases of common stock, Shares |  | (459,321) |  |  | 459,321
Ending Balance at Dec. 31, 2018 | 342,963 | $ 700 | 124,224 | 416,942 | $ (198,903)
Ending Balance, Shares at Dec. 31, 2018 |  | 58,551,653 |  |  | 11,446,683
Net income | 144,738 |  |  | 144,738 |
Employee stock plans | 1,089 | $ 1 | 1,088 |  |
Employee stock plans, Shares |  | 77,141 |  |  |
Shares withheld for taxes on awards | (8,245) |  | (8,245) |  |
Shares withheld for taxes on awards, Shares |  | (108,378) |  |  |
Stock-based compensation | 6,930 | $ 1 | 6,929 |  |
Stock-based compensation, Shares |  | 220,364 |  |  |
Repurchases of common stock | (38,300) |  |  |  | $ (38,300)
Repurchases of common stock, Shares |  | (500,059) |  |  | 500,059
Ending Balance at Dec. 31, 2019 | $ 449,175 | $ 702 | $ 123,996 | $ 561,680 | $ (237,203)
Ending Balance, Shares at Dec. 31, 2019 |  | 58,240,721 |  |  | 11,946,742

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