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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (unaudited) - USD ($)
$ in Thousands
Total
Common Shares
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2021   41,551,524      
Beginning balance at Dec. 31, 2021 $ 990,777 $ 207,758 $ 419,760 $ 369,783 $ (6,524)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes (in shares)   79,428      
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes (2,924) $ 397 (3,321)    
Stock Issued Under Stock Purchase Plan, net of expenses (132)   (132)    
Net Income 242,179     242,179  
Other Comprehensive Income (Loss) (454)       (454)
Stock Compensation Expense 6,141   6,141    
Common Dividends (51,564)     (51,564)  
Ending balance (in shares) at Sep. 30, 2022   41,630,952      
Ending balance at Sep. 30, 2022 1,184,023 $ 208,155 422,448 560,398 (6,978)
Beginning balance (in shares) at Jun. 30, 2022   41,630,799      
Beginning balance at Jun. 30, 2022 1,116,543 $ 208,154 421,951 493,351 (6,913)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes (in shares)   153      
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes 0 $ 1 (1)    
Stock Issued Under Stock Purchase Plan, net of expenses (132)   (132)    
Net Income 84,239     84,239  
Other Comprehensive Income (Loss) (65)       (65)
Stock Compensation Expense 630   630    
Common Dividends (17,192)     (17,192)  
Ending balance (in shares) at Sep. 30, 2022   41,630,952      
Ending balance at Sep. 30, 2022 $ 1,184,023 $ 208,155 422,448 560,398 (6,978)
Beginning balance (in shares) at Dec. 31, 2022 41,631,113 41,631,113      
Beginning balance at Dec. 31, 2022 $ 1,217,317 $ 208,156 423,034 585,212 915
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes (in shares)   79,408      
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes (3,088) $ 397 (3,485)    
Stock Issued Under Stock Purchase Plan, net of expenses (166)   (166)    
Net Income 236,424     236,424  
Other Comprehensive Income (Loss) 259       259
Stock Compensation Expense 6,975   6,975    
Common Dividends $ (54,792)     (54,792)  
Ending balance (in shares) at Sep. 30, 2023 41,710,521 41,710,521      
Ending balance at Sep. 30, 2023 $ 1,402,929 $ 208,553 426,358 766,844 1,174
Beginning balance (in shares) at Jun. 30, 2023   41,710,521      
Beginning balance at Jun. 30, 2023 1,328,439 $ 208,553 425,867 693,138 881
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net Income 91,974     91,974  
Other Comprehensive Income (Loss) 293       293
Stock Compensation Expense 491   491    
Common Dividends $ (18,268)     (18,268)  
Ending balance (in shares) at Sep. 30, 2023 41,710,521 41,710,521      
Ending balance at Sep. 30, 2023 $ 1,402,929 $ 208,553 $ 426,358 $ 766,844 $ 1,174