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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balances (in shares) at Dec. 31, 2018 111,757,105        
Balances at Dec. 31, 2018 $ 1,118 $ 892,331 $ 253,357 $ (1,065) $ 1,145,741
Net income (loss) 0 0 157,636 0 157,636
Comprehensive income (loss), net of tax $ 0 0 0 535 $ 535
Stock options exercised (in shares) 242,357       242,357
Stock options exercised $ 2 2,375 0 0 $ 2,377
Release of restricted stock units, net of tax (in shares) 358,361        
Release of restricted stock units, net of tax $ 4 (4,391) 0 0 (4,387)
Release of performance stock units, net of tax (in shares) 270,960        
Release of performance stock units, net of tax $ 3 (3,769) 0 0 $ (3,766)
Shares repurchased and retired (in shares) (1,086,675)       (1,087,000) [1],[2]
Shares repurchased and retired $ (12) (28,033) 0 0 $ (28,045) [2]
Dividends declared 0 0 (30,051) 0 (30,051)
Share-based compensation costs $ 0 25,202 0 0 25,202
Balances (in shares) at Dec. 31, 2019 111,542,108        
Balances at Dec. 31, 2019 $ 1,115 883,715 380,942 (530) 1,265,242
Net income (loss) 0 0 (134,700) 0 (134,700)
Comprehensive income (loss), net of tax $ 0 0 0 680 $ 680
Stock options exercised (in shares) 240,380       240,380
Stock options exercised $ 2 1,977 0 0 $ 1,979
Release of restricted stock units, net of tax (in shares) 469,765        
Release of restricted stock units, net of tax $ 5 (3,975) 0 0 (3,970)
Release of performance stock units, net of tax (in shares) 261,200        
Release of performance stock units, net of tax $ 3 (3,372) 0 0 $ (3,369)
Shares repurchased and retired (in shares) (682,596)       (683,000) [1],[2]
Shares repurchased and retired $ (7) (11,114) 0 0 $ (11,121) [2]
Share-based compensation costs $ 0 9,202 0 0 $ 9,202
Balances (in shares) at Dec. 31, 2020 111,830,857       111,830,857
Balances at Dec. 31, 2020 $ 1,118 876,433 246,242 150 $ 1,123,943
Net income (loss) 0 0 463,846 0 463,846
Comprehensive income (loss), net of tax $ 0 0 0 (330) $ (330)
Stock options exercised (in shares) 371,016       371,016
Stock options exercised $ 4 4,405 0 0 $ 4,409
Release of restricted stock units, net of tax (in shares) 349,231        
Release of restricted stock units, net of tax $ 3 (8,209) 0 0 (8,206)
Release of performance stock units, net of tax (in shares) 61,983        
Release of performance stock units, net of tax $ 1 (1,908) 0 0 $ (1,907)
Shares repurchased and retired (in shares) (1,309,947)       (1,310,000) [1],[2]
Shares repurchased and retired $ (13) (80,769) 0 0 $ (80,782) [2]
Share-based compensation costs $ 0 37,773 0 0 $ 37,773
Balances (in shares) at Dec. 31, 2021 111,303,140       111,303,140
Balances at Dec. 31, 2021 $ 1,113 $ 827,725 $ 710,088 $ (180) $ 1,538,746
[1] All shares repurchased have been retired and constitute authorized but unissued shares.
[2] Shares repurchased reflect repurchases settled during the twelve months ended December 31, 2021, 2020 and 2019. These amounts exclude repurchases, if any, traded but not yet settled on or before December 31, 2021, 2020 and 2019.