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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Beginning Balance at Dec. 31, 2018 $ 3,505,423 $ 2,673 $ 2,827,154 $ 1,753,557 $ 2,487 $ (1,080,448)
Beginning Balance (in shares) at Dec. 31, 2018   267,316        
Net loss (425,703)     (425,703)    
Foreign currency translation adjustment 2,991       (2,991)  
Issuance of restricted stock 0 $ 2 (2)      
Issuance of restricted stock (in shares)   185        
Vesting of restricted stock units 0 $ 12 (12)      
Vesting of restricted stock units (in shares)   1,173        
Forfeitures of restricted stock 0          
Forfeitures of restricted stock (in shares)   2        
Exercise of stock options 9,219 $ 7 9,212      
Exercised   700        
Stock-based compensation 39,328   39,328      
Payment of cash dividends (32,428)     (32,428)    
Dividend equivalents (524)     (524)    
Purchase of treasury stock (264,686)         (264,686)
Ending Balance at Dec. 31, 2019 2,833,620 $ 2,694 2,875,680 1,294,902 5,478 (1,345,134)
Ending Balance (in shares) at Dec. 31, 2019   269,372        
Net loss (803,692)     (803,692)    
Foreign currency translation adjustment (66)       (66)  
Issuance of restricted stock $ 3 (3)      
Issuance of restricted stock (in shares)   333        
Vesting of restricted stock units $ 13 (13)      
Vesting of restricted stock units (in shares)   1,324        
Stock-based compensation 26,572   26,572      
Payment of cash dividends (18,862)     (18,862)    
Dividend equivalents (334)     (334)    
Purchase of treasury stock (21,179)         (21,179)
Ending Balance at Dec. 31, 2020 $ 2,016,059 $ 2,710 2,902,236 472,014 5,412 (1,366,313)
Ending Balance (in shares) at Dec. 31, 2020 271,028,688 271,029        
Net loss $ (654,545)     (654,545)    
Foreign currency translation adjustment 503       503  
Restricted stock issued for acquisition 248,025 $ 263 247,762      
Restricted stock issued for acquisition (in shares)   26,274        
Issuance of restricted stock   $ 6 (6)      
Issuance of restricted stock (in shares)   621        
Vesting of restricted stock units $ 0 $ 14 (14)      
Vesting of restricted stock units (in shares)   1,345        
Exercised 0          
Stock-based compensation $ 21,558   21,558      
Payment of cash dividends (15,605)     (15,605)    
Dividend equivalents (180)     (180)    
Purchase of treasury stock (6,328)         (6,328)
Ending Balance at Dec. 31, 2021 $ 1,609,487 $ 2,993 $ 3,171,536 $ (198,316) $ 5,915 $ (1,372,641)
Ending Balance (in shares) at Dec. 31, 2021 299,268,967 299,269