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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Common Stock [Member] Class A [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Loss [Member] | Retained Earnings [Member] | Total | Class A [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2013 | $ 91 | $ 397,383 | $ (826,904) | $ (46,228) | $ 1,334,277 | $ 858,619 |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 0 | 0 | 0 | 0 | 189,176 | 189,176 |
Other comprehensive income, net of tax | 0 | 0 | 0 | (5,293) | 0 | (5,293) |
Repurchase of Class A common stock (Note 11) | 0 | 0 | (45,724) | 0 | 0 | (45,724) | $ (45,724)
Exercise of employee stock options/vesting of stock awards | 0 | (12,440) | 10,020 | 0 | 0 | (2,420) |
Excess tax benefit from equity awards | 0 | 11,947 | 0 | 0 | 0 | 11,947 |
Stock-based compensation | 0 | 17,504 | 0 | 0 | 0 | 17,504 |
Cash dividends | 0 | 0 | 0 | 0 | (81,371) | (81,371) |
Balance at end of period at Dec. 31, 2014 | 91 | 414,394 | (862,608) | (51,521) | 1,442,082 | 942,438 |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 0 | 0 | 0 | 0 | 133,046 | 133,046 |
Other comprehensive income, net of tax | 0 | 0 | 0 | (19,748) | 0 | (19,748) |
Repurchase of Class A common stock (Note 11) | 0 | 0 | (164,094) | 0 | 0 | (164,094) | (164,094)
Exercise of employee stock options/vesting of stock awards | 0 | (6,324) | 9,639 | 0 | 0 | 3,315 |
Excess tax benefit from equity awards | 0 | 4,451 | 0 | 0 | 0 | 4,451 |
Stock-based compensation | 0 | 7,400 | 0 | 0 | 0 | 7,400 |
Cash dividends | 0 | 0 | 0 | 0 | (81,187) | (81,187) |
Balance at end of period at Dec. 31, 2015 | 91 | 419,921 | (1,017,063) | (71,269) | 1,493,941 | 825,621 |
Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 0 | 0 | 0 | 0 | 143,086 | 143,086 |
Other comprehensive income, net of tax | 0 | 0 | 0 | (12,853) | 0 | (12,853) |
Repurchase of Class A common stock (Note 11) | 0 | 0 | (247,208) | 0 | 0 | (247,208) | $ (247,208)
Exercise of employee stock options/vesting of stock awards | 0 | 159 | 14,148 | 0 | 0 | 14,307 |
Excess tax benefit from equity awards | 0 | 3,840 | 0 | 0 | 0 | 3,840 |
Stock-based compensation | 0 | 8,890 | 0 | 0 | 0 | 8,890 |
Equity component of convertible note issuance (net) | 0 | 6,825 | 0 | 0 | 0 | 6,825 |
Cash dividends | 0 | 0 | 0 | 0 | (78,438) | (78,438) |
Balance at end of period at Dec. 31, 2016 | $ 91 | $ 439,635 | $ (1,250,123) | $ (84,122) | $ 1,558,589 | $ 664,070 |

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