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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Common stock [Member]
Additional paid-in capital [Member]
Retained earnings [Member]
Treasury stock [Member]
Accumulated other comprehensive income (loss), net [Member]
Total
Balance in the beginning at Dec. 31, 2021 $ 515 $ 1,014,294 $ 289,876   $ (6,963) $ 840,106
Balance in the beginning (Treasury Stock) at Dec. 31, 2021       $ (457,616)    
Increase (Decrease) in Stockholders' Equity            
Net income     18,352     18,352
Stock-based compensation   1,151       1,151
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net   (1,113)   397   (716)
Cash dividends declared     (7,008)     (7,008)
Other comprehensive income (loss)         (31,670) (31,670)
Balance in the ending at Mar. 31, 2022 515 1,014,332 301,220   (38,633) 820,215
Balance in the ending (Treasury Stock) at Mar. 31, 2022       (457,219)    
Balance in the beginning at Dec. 31, 2022 515 1,159,508 330,721   (88,204) 1,092,202
Balance in the beginning (Treasury Stock) at Dec. 31, 2022       (310,338)   (310,338)
Increase (Decrease) in Stockholders' Equity            
Net income     40,283     40,283
Stock-based compensation   1,427       1,427
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net   (499)   301   (198)
Cash dividends declared     (9,564)     (9,564)
Other comprehensive income (loss)         9,577 9,577
Balance in the ending at Mar. 31, 2023 $ 515 $ 1,160,436 $ 361,440   $ (78,627) 1,133,727
Balance in the ending (Treasury Stock) at Mar. 31, 2023       $ (310,037)   $ (310,037)