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Consolidated Statement of Stockholders' Equity - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in-Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Beginning balance, shares at Dec. 31, 2016 |  | 25,663 |  |  |  |
Beginning balance at Dec. 31, 2016 | $ 930,200 | $ 257 | $ 290,899 | $ 1,053,301 | $ (146,944) | $ (267,313)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 33,939 | 0 | 0 | 33,939 | 0 | 0
Other comprehensive income (loss), net of tax | 6,795 | $ 0 | 0 | 0 | 6,795 | 0
Stock Issued During Period, Shares, Employee Stock Purchase Plans |  | (86) |  |  |  |
Stock Issued During Period, Value, Employee Stock Purchase Plan | (2,898) | $ (1) | (11,507) | 0 | 0 | 8,610
Stock-based compensation | 6,063 | 0 | 6,063 | 0 | 0 | 0
Cash dividends | (5,139) | $ 0 | 0 | (5,139) | 0 | 0
Ending balance, shares at Mar. 31, 2017 |  | 25,577 |  |  |  |
Ending balance at Mar. 31, 2017 | $ 968,960 | $ 256 | 285,455 | $ 1,082,101 | $ (140,149) | $ (258,703)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation |  |  | $ 0 |  |  |

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