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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Adoption of new accounting standard
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Retained Earnings
Adoption of new accounting standard
Beginning Balance (in shares) at Dec. 31, 2018 62,100   62,000        
Beginning Balance at Dec. 31, 2018 $ 1,647,000 $ 85,000 $ 0 $ 643,000 $ (8,000) $ 1,012,000 $ 85,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 198,000         198,000  
Termination of warrants (103,000)     (103,000)      
Other comprehensive income (loss), net 5,000       5,000    
Share-based compensation (in shares)     1,000        
Share-based compensation $ 3,000     3,000      
Ending Balance (in shares) at Mar. 31, 2019 62,100   63,000        
Ending Balance at Mar. 31, 2019 $ 1,835,000   $ 0 543,000 (3,000) 1,295,000  
Beginning Balance (in shares) at Dec. 31, 2018 62,100   62,000        
Beginning Balance at Dec. 31, 2018 $ 1,647,000 $ 85,000 $ 0 643,000 (8,000) 1,012,000 $ 85,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 394,000            
Other comprehensive income (loss), net 13,000            
Ending Balance (in shares) at Jun. 30, 2019     63,000        
Ending Balance at Jun. 30, 2019 $ 1,736,000   $ 0 240,000 5,000 1,491,000  
Beginning Balance (in shares) at Mar. 31, 2019 62,100   63,000        
Beginning Balance at Mar. 31, 2019 $ 1,835,000   $ 0 543,000 (3,000) 1,295,000  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 196,000         196,000  
Termination of warrants (321,000)     (321,000)      
Other comprehensive income (loss), net 8,000       8,000    
Share-based compensation 18,000     18,000      
Ending Balance (in shares) at Jun. 30, 2019     63,000        
Ending Balance at Jun. 30, 2019 $ 1,736,000   $ 0 240,000 5,000 1,491,000  
Beginning Balance (in shares) at Dec. 31, 2019 61,900   62,000        
Beginning Balance at Dec. 31, 2019 $ 1,960,000   $ 0 175,000 4,000 1,781,000  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 178,000         178,000  
Common stock purchases (in shares)     (3,400)        
Common stock purchases (446,000)   $ (446,000) (9,000)   (437,000)  
Termination of warrants (30,000)     (30,000)      
Other comprehensive income (loss), net (19,000)       (19,000)    
Share-based compensation $ 4,000     4,000      
Ending Balance (in shares) at Mar. 31, 2020 58,600   59,000        
Ending Balance at Mar. 31, 2020 $ 1,647,000   $ 0 140,000 (15,000) 1,522,000  
Beginning Balance (in shares) at Dec. 31, 2019 61,900   62,000        
Beginning Balance at Dec. 31, 2019 $ 1,960,000   $ 0 175,000 4,000 1,781,000  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 454,000            
Other comprehensive income (loss), net 28,000            
Share-based compensation (in shares)     188        
Ending Balance (in shares) at Jun. 30, 2020     59,000        
Ending Balance at Jun. 30, 2020 $ 1,996,000   $ 0 166,000 32,000 1,798,000  
Beginning Balance (in shares) at Mar. 31, 2020 58,600   59,000        
Beginning Balance at Mar. 31, 2020 $ 1,647,000   $ 0 140,000 (15,000) 1,522,000  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 276,000            
Other comprehensive income (loss), net 47,000       47,000    
Share-based compensation 26,000     26,000      
Ending Balance (in shares) at Jun. 30, 2020     59,000        
Ending Balance at Jun. 30, 2020 $ 1,996,000   $ 0 $ 166,000 $ 32,000 $ 1,798,000