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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2018 $ 3,216,301 $ 6,547 $ 823,347 $ (33,511) $ 2,723,592 $ (306,788) $ 3,114
Beginning balance (in shares) at Dec. 31, 2018   65,472,000       (5,608,000)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Stock option exercises 5,796 $ 0 675 0 0 $ 5,121 0
Stock option exercises (in shares)   0       93,000  
Issuance of stock for equity awards, net of forfeitures 0 $ 0 (1,735) 0 0 $ 1,735 0
Issuance of stock for equity awards, net of forfeitures (in shares)   0       32,000  
Tax withholdings on equity award vesting (2,031) $ 0 0 0 0 $ (2,031) 0
Tax withholdings on equity award vesting (in shares)   0       (30,000)  
Amortization of unearned share-based compensation 13,612 $ 0 13,612 0 0 $ 0 0
Total comprehensive income (loss), net of taxes 138,731 0 0 (4,288) 142,347 0 672
Return of investment to noncontrolling interests (817) 0 0 0 0 0 (817)
Ending balance at Dec. 31, 2019 3,371,592 $ 6,547 835,899 (37,799) 2,865,939 $ (301,963) 2,969
Ending balance (in shares) at Dec. 31, 2019   65,472,000       (5,513,000)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Stock option exercises 353 $ 0 26 0 0 $ 327 0
Stock option exercises (in shares)   0       15,000  
Issuance of stock for equity awards, net of forfeitures 0 $ 0 (5,668) 0 0 $ 5,668 0
Issuance of stock for equity awards, net of forfeitures (in shares)   0       103,000  
Tax withholdings on equity award vesting (3,193) $ 0 0 0 0 $ (3,193) 0
Tax withholdings on equity award vesting (in shares)   0       (39,000)  
Amortization of unearned share-based compensation 14,722 $ 0 14,722 0 0 $ 0 0
Total comprehensive income (loss), net of taxes (295,245) 0 0 (23,653) (272,546) 0 954
Return of investment to noncontrolling interests (676) 0 0 0 0 0 (676)
Ending balance at Dec. 31, 2020 3,087,553 $ 6,547 844,979 (61,452) 2,593,393 $ (299,161) 3,247
Ending balance (in shares) at Dec. 31, 2020   65,472,000       (5,434,000)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Stock option exercises 629 $ 0 21 0 0 $ 608 0
Stock option exercises (in shares)   0       12,000  
Issuance of stock for equity awards, net of forfeitures 0 $ 0 (6,201) 0 0 $ 6,201 0
Issuance of stock for equity awards, net of forfeitures (in shares)   0       113,000  
Tax withholdings on equity award vesting (2,856) $ 0 0 0 0 $ 2,856 0
Tax withholdings on equity award vesting (in shares)   0       (52,000)  
Amortization of unearned share-based compensation 15,713 $ 0 15,713 0 0 $ 0 0
Total comprehensive income (loss), net of taxes (211,285) 0 0 (35,486) (246,954) 0 183
Return of investment to noncontrolling interests (972) 0 0 0 0 0 (972)
Ending balance at Dec. 31, 2021 $ 2,888,782 $ 6,547 $ 854,512 $ (25,966) $ 2,346,439 $ (295,208) $ 2,458
Ending balance (in shares) at Dec. 31, 2021   65,472,000       (5,361,000)