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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2021   31,950,092      
Beginning balance at Dec. 31, 2021 $ 1,350,775 $ 316 $ 434,640 $ 930,061 $ (14,242)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net Income 61,440     61,440  
Other comprehensive income (loss), net of tax (138,127)       (138,127)
Stock-based compensation expense 5,314   5,314    
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares)   3,289      
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes 97   97    
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)   66,038      
Vesting of time-based stock awards issued at date of grant, net of shares withheld for payroll taxes   $ 2 (2)    
Vesting of performance-based stock awards, net of shares withheld for payroll taxes (in shares)   21,026      
Time based stock awards granted (in shares)   166,471      
Issuance of common stock related to employee stock purchase plan (in shares)   6,401      
Issuance of common stock related to employee stock purchase plan 369   369    
Cash dividends declared (27,148)     (27,148)  
Ending balance (in shares) at Jun. 30, 2022   32,081,241      
Ending balance at Jun. 30, 2022 1,252,720 $ 318 440,418 964,353 (152,369)
Beginning balance (in shares) at Mar. 31, 2022   32,079,474      
Beginning balance at Mar. 31, 2022 1,279,554 $ 318 437,820 963,140 (121,724)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net Income 15,696     15,696  
Other comprehensive income (loss), net of tax (30,645)       (30,645)
Stock-based compensation expense 2,349   2,349    
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares)   1,500      
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes 77   77    
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)   3,810      
Time based stock awards granted (in shares)   1,055      
Issuance of common stock related to employee stock purchase plan (in shares)   3,022      
Issuance of common stock related to employee stock purchase plan 172   172    
Cash dividends declared (14,483)     (14,483)  
Ending balance (in shares) at Jun. 30, 2022   32,081,241      
Ending balance at Jun. 30, 2022 $ 1,252,720 $ 318 440,418 964,353 (152,369)
Beginning balance (in shares) at Dec. 31, 2022 31,346,903 31,346,903      
Beginning balance at Dec. 31, 2022 $ 1,228,321 $ 310 412,303 1,015,215 (199,507)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net Income 52,926     52,926  
Other comprehensive income (loss), net of tax 7,920       7,920
Stock-based compensation expense 5,684   5,684    
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)   (44,064)      
Vesting of time-based stock awards issued at date of grant, net of shares withheld for payroll taxes   $ 2 (2)    
Vesting of performance-based stock awards, net of shares withheld for payroll taxes (in shares)   27,296      
Time based stock awards granted (in shares)   173,542      
Issuance of common stock related to employee stock purchase plan (in shares)   8,405      
Issuance of common stock related to employee stock purchase plan $ 314   314    
Cash dividends declared (in shares) 0        
Cash dividends declared $ (27,362)     (27,362)  
Common stock repurchased (in shares)   (1,600,000)      
Common stock repurchased $ (48,037) $ (16) (48,021)    
Ending balance (in shares) at Jun. 30, 2023 29,912,082 29,912,082      
Ending balance at Jun. 30, 2023 $ 1,219,766 $ 296 370,278 1,040,779 (191,587)
Beginning balance (in shares) at Mar. 31, 2023   31,111,647      
Beginning balance at Mar. 31, 2023 1,241,958 $ 308 397,012 1,025,552 (180,914)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net Income 28,692     28,692  
Other comprehensive income (loss), net of tax (10,673)       (10,673)
Stock-based compensation expense 2,736   2,736    
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)   6,960      
Time based stock awards granted (in shares)   2,008      
Issuance of common stock related to employee stock purchase plan (in shares)   5,387      
Issuance of common stock related to employee stock purchase plan 179   179    
Cash dividends declared (13,465)     (13,465)  
Common stock repurchased (in shares)   (1,200,000)      
Common stock repurchased $ (29,661) $ (12) (29,649)    
Ending balance (in shares) at Jun. 30, 2023 29,912,082 29,912,082      
Ending balance at Jun. 30, 2023 $ 1,219,766 $ 296 $ 370,278 $ 1,040,779 $ (191,587)