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Consolidated Statements Of Changes In Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common stock
Additional paid-in capital
Retained earnings
Treasury stock
Accumulated other comprehensive income (loss), net
Balance at beginning of period (in shares) at Dec. 31, 2020   123,264,864        
Balance at beginning of period at Dec. 31, 2020 $ 2,053,745 $ 136 $ 1,434,916 $ 785,940 $ (200,000) $ 32,753
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Convertible debt, cumulative effect on retained earnings before tax       10,715    
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt (10,705)   (21,420)      
AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt, tax 3,154   3,154      
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)   420,623        
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations 0        
Stock-based compensation 3,501   3,501      
Cash dividends declared on common stock (51,838)     (51,838)    
Comprehensive income:            
Net income 152,949     152,949    
Other comprehensive income (loss) (29,210)         (29,210)
Repurchase of treasury stock (in shares)   3,487,426        
Repurchase of treasury stock (47,198)       (47,198)  
Balance at end of period (in shares) at Sep. 30, 2021   120,198,061        
Balance at end of period at Sep. 30, 2021 2,074,398 $ 136 1,420,151 897,766 (247,198) 3,543
Balance at beginning of period (in shares) at Jun. 30, 2021   123,673,832        
Balance at beginning of period at Jun. 30, 2021 2,092,870 $ 136 1,418,135 859,548 (200,000) 15,051
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)   11,655        
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations 0        
Stock-based compensation 2,016   2,016      
Cash dividends declared on common stock (17,281)     (17,281)    
Comprehensive income:            
Net income 55,499     55,499    
Other comprehensive income (loss) (11,508)         (11,508)
Balance at end of period (in shares) at Sep. 30, 2021   120,198,061        
Balance at end of period at Sep. 30, 2021 2,074,398 $ 136 1,420,151 897,766 (247,198) 3,543
Balance at beginning of period (in shares) at Dec. 31, 2021   120,006,452        
Balance at beginning of period at Dec. 31, 2021 2,092,983 $ 136 1,421,698 932,561 (250,000) (11,412)
Balance at end of period (in shares) at Jun. 30, 2022   119,473,939        
Balance at end of period at Jun. 30, 2022 2,000,369 $ 137 1,424,891 1,011,715 (264,667) (171,707)
Balance at beginning of period (in shares) at Dec. 31, 2021   120,006,452        
Balance at beginning of period at Dec. 31, 2021 2,092,983 $ 136 1,421,698 932,561 (250,000) (11,412)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)   511,787        
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations 531 $ 1 530      
Stock-based compensation 5,824   5,824      
Cash dividends declared on common stock (50,397)     (50,397)    
Comprehensive income:            
Net income 166,574     166,574    
Other comprehensive income (loss) $ (225,123)         (225,123)
Repurchase of treasury stock (in shares) 1,038,986 1,038,986        
Repurchase of treasury stock $ (14,667)       (14,667)  
Balance at end of period (in shares) at Sep. 30, 2022   119,479,253        
Balance at end of period at Sep. 30, 2022 1,975,725 $ 137 1,428,052 1,048,738 (264,667) (236,535)
Balance at beginning of period (in shares) at Jun. 30, 2022   119,473,939        
Balance at beginning of period at Jun. 30, 2022 2,000,369 $ 137 1,424,891 1,011,715 (264,667) (171,707)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)   5,314        
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations 0      
Stock-based compensation 3,161   3,161      
Cash dividends declared on common stock (16,725)     (16,725)    
Comprehensive income:            
Net income 53,748     53,748    
Other comprehensive income (loss) $ (64,828)         (64,828)
Repurchase of treasury stock (in shares) 0          
Repurchase of treasury stock $ 0          
Balance at end of period (in shares) at Sep. 30, 2022   119,479,253        
Balance at end of period at Sep. 30, 2022 $ 1,975,725 $ 137 $ 1,428,052 $ 1,048,738 $ (264,667) $ (236,535)