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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Cumulative Effect, Period Of Adoption, Adjustment
Common Stock
Retained Earnings
Stock in Rabbi Trust Assumed in Acquisition
Rabbi Trust Obligation
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2019     29,601,000        
Beginning balance at Dec. 31, 2019 $ 852,401   $ 429,514 $ 417,764 $ (2,587) $ 2,587 $ 5,123
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 57,829     57,829      
Cash dividends declared (15,605)     (15,605)      
Change in Rabbi Trust obligation 0       357 (357)  
Equity issued related to acquisition earnout (in shares)     24,000        
Equity issued related to acquisition earnout 494   $ 494        
Stock repurchases (in shares)     (986,000)        
Stock repurchases (28,701)   $ (28,701)        
Stock withheld for payment of taxes (in shares)     (7,000)        
Stock withheld for payment of taxes (178)   $ (178)        
Stock-based compensation (in shares)     56,000        
Stock-based compensation 2,222   $ 2,222        
Other comprehensive income (loss) 12,356           12,356
Ending balance (in shares) at Sep. 30, 2020     28,688,000        
Ending balance at Sep. 30, 2020 880,818   $ 403,351 459,988 (2,230) 2,230 17,479
Beginning balance (in shares) at Jun. 30, 2020     28,977,000        
Beginning balance at Jun. 30, 2020 867,891   $ 408,699 441,846 (2,217) 2,217 17,346
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 23,297     23,297      
Cash dividends declared (5,155)     (5,155)      
Change in Rabbi Trust obligation 0       (13) 13  
Equity issued related to acquisition earnout (in shares)     24,000        
Equity issued related to acquisition earnout 494   $ 494        
Stock repurchases (in shares)     (306,000)        
Stock repurchases (6,269)   $ (6,269)        
Stock withheld for payment of taxes (in shares)     (7,000)        
Stock withheld for payment of taxes (178)   $ (178)        
Stock-based compensation (in shares)     0        
Stock-based compensation 605   $ 605        
Other comprehensive income (loss) 133           133
Ending balance (in shares) at Sep. 30, 2020     28,688,000        
Ending balance at Sep. 30, 2020 $ 880,818   $ 403,351 459,988 (2,230) 2,230 17,479
Beginning balance (in shares) at Dec. 31, 2020 28,579,335   28,579,000        
Beginning balance at Dec. 31, 2020 $ 893,421 $ (17,051) $ 400,582 478,489 (2,243) 2,243 14,350
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 85,122     85,122      
Cash dividends declared (17,086)     (17,086)      
Change in Rabbi Trust obligation 0       452 (452)  
Stock repurchases (in shares)     (107,000)        
Stock repurchases (4,036)   $ (4,036)        
Stock withheld for payment of taxes (in shares)     (13,000)        
Stock withheld for payment of taxes (506)   $ (506)        
Stock-based compensation (in shares)     65,000        
Stock-based compensation 2,018   $ 2,018        
Other comprehensive income (loss) $ (12,132)           (12,132)
Ending balance (in shares) at Sep. 30, 2021 28,524,480   28,524,000        
Ending balance at Sep. 30, 2021 $ 929,750   $ 398,058 529,474 (1,791) 1,791 2,218
Beginning balance (in shares) at Jun. 30, 2021     28,492,000        
Beginning balance at Jun. 30, 2021 904,510   $ 397,704 507,531 (1,928) 1,928 (725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 27,643     27,643      
Cash dividends declared (5,700)     (5,700)      
Change in Rabbi Trust obligation 0       137 (137)  
Stock withheld for payment of taxes (in shares)     (6,000)        
Stock withheld for payment of taxes (182)   $ (182)        
Stock-based compensation (in shares)     38,000        
Stock-based compensation 536   $ 536        
Other comprehensive income (loss) $ 2,943           2,943
Ending balance (in shares) at Sep. 30, 2021 28,524,480   28,524,000        
Ending balance at Sep. 30, 2021 $ 929,750   $ 398,058 $ 529,474 $ (1,791) $ 1,791 $ 2,218