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Consolidated Statements Of Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Cumulative Effect, Period of Adoption, Adjustment
Retained Earnings
Shareholders' equity (shares) at Dec. 31, 2019   270,235          
Shareholders' equity at Dec. 31, 2019 $ 5,458,180 $ 2,702 $ 3,235,149 $ (245) $ 2,220,574 $ (735) $ (735)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Stock option exercises (shares)   13          
Stock option exercises 99   99        
Share issuances (shares)   755          
Share issuances 4,096 $ 8 4,088        
Dividends declared (65,056)       (65,056)    
Share repurchases (shares)   (2,825)          
Share repurchases (95,676) $ (28)     (95,648)    
Cash paid for shares withheld for taxes (14,853)       (14,853)    
Share-based compensation 13,232   13,232        
Net income 552,331       552,331    
Other comprehensive income 50     50      
Shareholders' equity (shares) at Jun. 30, 2020   268,178          
Shareholders' equity at Jun. 30, 2020 5,851,668 $ 2,682 3,252,568 (195) 2,596,613    
Shareholders' equity (shares) at Mar. 31, 2020   268,149          
Shareholders' equity at Mar. 31, 2020 5,530,391 $ 2,681 3,247,475 (220) 2,280,455    
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Stock option exercises (shares)   6          
Stock option exercises 48   48        
Share issuances (shares)   23          
Share issuances 1 $ 1          
Dividends declared (32,447)       (32,447)    
Cash paid for shares withheld for taxes (15)       (15)    
Share-based compensation 5,045   5,045        
Net income 348,620       348,620    
Other comprehensive income 25     25      
Shareholders' equity (shares) at Jun. 30, 2020   268,178          
Shareholders' equity at Jun. 30, 2020 5,851,668 $ 2,682 3,252,568 (195) 2,596,613    
Shareholders' equity (shares) at Dec. 31, 2020   266,464          
Shareholders' equity at Dec. 31, 2020 6,569,989 $ 2,665 3,261,412 (145) 3,306,057    
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Stock option exercises (shares)   1          
Stock option exercises 11   11        
Share issuances (shares)   517          
Share issuances 4,181 $ 5 4,176        
Dividends declared (74,139)       (74,139)    
Share repurchases (shares)   (6,915)          
Share repurchases (353,703) $ (70)     (353,633)    
Cash paid for shares withheld for taxes (10,607)       (10,607)    
Share-based compensation 15,180   15,180        
Net income 807,506       807,506    
Other comprehensive income 50     50      
Shareholders' equity (shares) at Jun. 30, 2021   260,067          
Shareholders' equity at Jun. 30, 2021 6,958,468 $ 2,600 3,280,779 (95) 3,675,184    
Shareholders' equity (shares) at Mar. 31, 2021   263,637          
Shareholders' equity at Mar. 31, 2021 6,685,274 $ 2,636 3,274,154 (120) 3,408,604    
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share issuances (shares)   12          
Share issuances 0   0        
Dividends declared (36,814)       (36,814)    
Share repurchases (shares)   (3,582)          
Share repurchases (200,000) $ (36)     (199,964)    
Cash paid for shares withheld for taxes (41)       (41)    
Share-based compensation 6,625   6,625        
Net income 503,399       503,399    
Other comprehensive income 25     25      
Shareholders' equity (shares) at Jun. 30, 2021   260,067          
Shareholders' equity at Jun. 30, 2021 $ 6,958,468 $ 2,600 $ 3,280,779 $ (95) $ 3,675,184