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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     24,203     24,203
Other comprehensive income (loss)       10,299   10,299
Stock-based compensation   263       263
Cash dividends and dividend equivalents     (12,389)     (12,389)
Balance at Sep. 30, 2020 $ 275 190,787 146,101 18,131   355,294
Balance (in shares) at Sep. 30, 2020 27,457,306          
Balance at Jun. 30, 2020 $ 275 190,687 139,667 17,211   347,840
Balance (in shares) at Jun. 30, 2020 27,457,306          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     10,563     10,563
Other comprehensive income (loss)       920   920
Stock-based compensation   100       100
Cash dividends and dividend equivalents     (4,129)     (4,129)
Balance at Sep. 30, 2020 $ 275 190,787 146,101 18,131   355,294
Balance (in shares) at Sep. 30, 2020 27,457,306          
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     42,677     42,677
Other comprehensive income (loss)       (13,616)   (13,616)
Stock-based compensation   538       538
Issuance of common stock upon vesting of restricted stock units (in shares) 20,225          
Repurchase of common stock         $ (2,323) (2,323)
Repurchase of common stock (in shares) (143,103)          
Cash dividends and dividend equivalents     (12,372)     (12,372)
Balance at Sep. 30, 2021 $ 275 191,413 184,919 4,537 (2,323) 378,821
Balance (in shares) at Sep. 30, 2021 27,334,428          
Balance at Jun. 30, 2021 $ 275 191,185 175,328 8,386 (1,980) 373,194
Balance (in shares) at Jun. 30, 2021 27,355,053          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     13,715     13,715
Other comprehensive income (loss)       (3,849)   (3,849)
Stock-based compensation   228       228
Repurchase of common stock         (343) (343)
Repurchase of common stock (in shares) (20,625)          
Cash dividends and dividend equivalents     (4,124)     (4,124)
Balance at Sep. 30, 2021 $ 275 $ 191,413 $ 184,919 $ 4,537 $ (2,323) $ 378,821
Balance (in shares) at Sep. 30, 2021 27,334,428