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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock
Surplus
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Total
Balance at Dec. 31, 2019 $ 275 $ 190,524 $ 134,287 $ 7,832   $ 332,918
Balance (in shares) at Dec. 31, 2019 27,457,306          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     36,845     36,845
Other comprehensive loss       10,321   10,321
Stock-based compensation   351       351
Cash dividends and dividend equivalents     (16,518)     (16,518)
Balance at Dec. 31, 2020 $ 275 190,875 154,614 18,153   363,917
Balance (in shares) at Dec. 31, 2020 27,457,306          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     56,271     56,271
Other comprehensive loss       (16,682)   (16,682)
Stock-based compensation   764       764
Issuance of common stock upon vesting of restricted stock units (in shares) 20,225          
Issuance of common stock in NXT acquisition $ 18 29,252       29,270
Issuance of common stock in NXT acquisition (in shares) 1,799,016          
Repurchase of common stock         $ (4,906) (4,906)
Repurchase of common stock (in shares) (290,486)          
Cash dividends and dividend equivalents     (16,753)     (16,753)
Balance at Dec. 31, 2021 $ 293 220,891 194,132 1,471 (4,906) 411,881
Balance (in shares) at Dec. 31, 2021 28,986,061          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     56,456     56,456
Other comprehensive loss       (73,230)   (73,230)
Stock-based compensation   1,949       1,949
Issuance of common stock upon vesting of restricted stock units, net of tax withholdings   (57)       (57)
Issuance of common stock upon vesting of restricted stock units (in shares) 31,944          
Repurchase of common stock         (4,783) (4,783)
Repurchase of common stock (in shares) (265,379)          
Cash dividends and dividend equivalents     (18,584)     (18,584)
Balance at Dec. 31, 2022 $ 293 $ 222,783 $ 232,004 $ (71,759) $ (9,689) $ 373,632
Balance (in shares) at Dec. 31, 2022 28,752,626