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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Common Stock [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Deferred Compensation, Share-based Payments [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
AOCI Attributable to Parent [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Common Stock [Member]
Deferred Compensation, Share-based Payments [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2018     26,730         26,730        
Balance at Dec. 31, 2018 $ (2,801) $ (2,801) $ 448,351 $ 1,395 $ (39,996) $ 203,040 $ 612,790 $ 448,351 $ 1,395 $ (39,996) $ 205,841 $ 615,591
Net income                     80,389 80,389
Other comprehensive income (loss)                   66,047   $ 66,047
Shares issued from stock warrant exercise, net of repurchase (in shares)               51        
Exercise of stock options (in shares)               269       516
Exercise of stock options               $ 13,699       $ 13,699
Restricted stock activity (in shares)               18        
Restricted stock activity               $ 1,697 (624)     1,073
Stock based compensation               $ 1,744       1,744
Stock awarded to employees (in shares)               2        
Stock awarded to employees               $ 105       105
Retirement of common stock (in shares)               (8)        
Retirement of common stock               $ (136)     (352) (488)
Dividends                     (43,942) (43,942)
Balance (in shares) at Dec. 31, 2019     27,062         27,062        
Balance at Dec. 31, 2019 $ 52 $ 52 $ 465,460 $ 771 $ 26,051 $ 239,187 $ 731,469 $ 465,460 771 26,051 239,135 731,417
Net income                     80,413 80,413
Other comprehensive income (loss)                   88,361   $ 88,361
Exercise of stock options (in shares)               52       52
Exercise of stock options               $ 2,838       $ 2,838
Restricted stock activity (in shares)               10        
Restricted stock activity               $ 1,270 (736)     534
Stock based compensation               $ 1,875       1,875
Stock awarded to employees (in shares)               2        
Stock awarded to employees               $ 100       100
Retirement of common stock (in shares)               (319)        
Retirement of common stock               $ (5,537)     (10,959) (16,496)
Dividends                     (44,285) (44,285)
Balance (in shares) at Dec. 31, 2020               26,807        
Balance at Dec. 31, 2020               $ 466,006 35 114,412 264,356 844,809
Net income                     86,509 86,509
Other comprehensive income (loss)                   (64,748)   $ (64,748)
Exercise of stock options (in shares)               53       53
Exercise of stock options               $ 3,017       $ 3,017
Restricted stock activity (in shares)               9        
Restricted stock activity               $ 526       526
Stock based compensation               $ 1,419       1,419
Stock awarded to employees (in shares)               1        
Stock awarded to employees               $ 106       106
Retirement of common stock (in shares)               (4)        
Retirement of common stock               $ (66)     (166) (232)
Dividends                     (44,304) (44,304)
Balance (in shares) at Dec. 31, 2021               26,866        
Balance at Dec. 31, 2021               $ 471,008 $ 35 $ 49,664 $ 306,395 $ 827,102