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EARNINGS PER COMMON SHARE (Schedule of Earnings Per Share Basic and Diluted) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income $ 41,919 $ 41,671 $ 119,872 $ 112,871
Income available to common shareholders $ 41,919 $ 41,671 $ 119,872 $ 111,616
Average common shares outstanding (in shares) 47,558 51,063 48,188 51,364
Average potential common shares-options (in shares) 368 453 406 384
Total weighted average common shares outstanding and equivalents (in shares) 47,926 51,516 48,594 51,748
Earnings per common share - basic (in dollars per share) $ 0.88 $ 0.82 $ 2.49 $ 2.18
Earnings per common share - diluted (in dollars per share) $ 0.87 $ 0.81 $ 2.47 $ 2.15
Preferred Non-Convertible Stock        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Non-convertible preferred stock (Series A, B, and D) $ 0 $ 0 $ 0 $ 1,255