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Earnings (Loss) Per Common Share and Stockholders' Equity (Schedule of Earnings Per Common Share, Basic and Diluted) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Earnings Per Share, Basic and Diluted [Line Items]    
Net income (loss) available to common stockholders - numerator for earnings (loss) per common share $ (166,913) $ 668,546 [1]
Weighted average common shares outstanding (shares) 83,416,966 96,866,125 [1]
Antidilutive impact due to net loss (1,334,402) 0
Denominator for earnings (loss) per common share - assuming dilution (shares) 83,416,966 97,953,313 [1]
Earnings (loss) per common share (dollars per share) $ (2.00) $ 6.90 [1]
Earnings (loss) per common share - assuming dilution (dollars per share) $ (2.00) $ 6.83 [1]
Stock options and deferred compensation agreements    
Earnings Per Share, Basic and Diluted [Line Items]    
Effect of dilutive securities: share-based payment arrangements (shares) 597,119 612,265
Restricted stock and restricted stock units    
Earnings Per Share, Basic and Diluted [Line Items]    
Effect of dilutive securities: share-based payment arrangements (shares) 737,283 474,923
[1] Certain prior period amounts have been recast. See Note 1 - Significant Accounting Policies for more information.