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Consolidated Statement of Stockholders' Equity - 9 months ended Sep. 30, 2016 - 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, 2015 |  | 25,706 |  |  |  |
Beginning balance at Dec. 31, 2015 | $ 918,252 | $ 257 | $ 291,092 | $ 926,169 | $ (137,984) | $ (161,282)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 116,237 | 0 | 0 | 116,237 | 0 | 0
Other comprehensive income (loss), net of tax | (19,462) | 0 | 0 | 0 | (19,462) | 0
Treasury Stock, Value, Acquired, Cost Method | (129,187) | $ 0 | 0 | 0 | 0 | (129,187)
Stock Issued During Period, Shares, Employee Stock Purchase Plans |  | (32) |  |  |  |
Stock Issued During Period, Value, Employee Stock Purchase Plan | 1,452 | $ 0 | 18,767 | 0 | 0 | 20,219
Stock-based compensation | 14,693 | 0 | 14,693 | 0 | 0 | 0
Cash dividends | (15,013) | $ 0 | 0 | (15,013) | 0 | 0
Ending balance, shares at Sep. 30, 2016 |  | 25,674 |  |  |  |
Ending balance at Sep. 30, 2016 | $ 886,972 | $ 257 | 287,018 | $ 1,027,393 | $ (157,446) | $ (270,250)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation |  |  | $ (145) |  |  |

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