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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, at Cost [Member]
Accumulated Other Comprehensive Loss [Member]
Retained Earnings [Member]
Total
Balance at beginning of period at Dec. 31, 2019 $ 91 $ 557,544 $ (1,324,826) $ (85,292) $ 1,727,772 $ 875,289
Stockholders' Equity [Roll Forward]            
Net income 0 0 0 0 191,355 191,355
Other comprehensive income (loss), net of tax 0 0 0 20,524 0 20,524
Repurchase of Class A common stock (Note 8) 0 0 (144,334) 0 0 (144,334)
Exercise of employee stock options/vesting of stock awards 0 (1,803) 7,567 0 0 5,764
Stock-based compensation 0 24,060 0 0 0 24,060
Cash dividends 0 0 0 0 (78,387) (78,387)
Balance at end of period at Dec. 31, 2020 91 579,801 (1,461,593) (64,768) 1,840,740 894,271
Stockholders' Equity [Roll Forward]            
Net income 0 0 0 0 147,266 147,266
Other comprehensive income (loss), net of tax 0 0 0 (9,128) 0 (9,128)
Repurchase of Class A common stock (Note 8) 0 0 (80,420) 0 0 (80,420)
Exercise of employee stock options/vesting of stock awards 0 (1,292) 15,153 0 0 13,861
Stock-based compensation 0 23,194 0 0 0 23,194
Cash dividends 0 0 0 0 (76,272) (76,272)
Balance at end of period at Dec. 31, 2021 91 601,703 (1,526,860) (73,896) 1,911,734 912,772
Stockholders' Equity [Roll Forward]            
Net income 0 0 0 0 104,778 104,778
Other comprehensive income (loss), net of tax 0 0 0 (12,613) 0 (12,613)
Repurchase of Class A common stock (Note 8) 0 0 (70,045) 0 0 (70,045)
Exercise of employee stock options/vesting of stock awards 0 (792) 27,844 0 0 27,052
Stock-based compensation 0 12,367 0 0 0 12,367
Cash dividends 0 0 0 0 (77,015) (77,015)
Balance at end of period at Dec. 31, 2022 $ 91 $ 613,278 $ (1,569,061) $ (86,509) $ 1,939,497 $ 897,296