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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total
Balance at Dec. 31, 2018 $ 24,123 $ 33,291 $ 350,423 $ (143,595) $ 264,242
Net income     32,291   32,291
Dividends paid     (14,319)   (14,319)
Stock-based compensation   6,330     6,330
Vesting of RSU's   (901)     (901)
Common stock issued - compensation plans 37 (37)    
Unpaid dividends accrued     (190)   (190)
Repurchase of 44,500 shares of common stock       (1,995) (1,995)
Balance at Dec. 31, 2019 24,160 38,683 368,205 (145,590) 285,458
Net income     90,398   90,398
Dividends paid     (113,896)   (113,896)
Stock-based compensation   6,128     6,128
Vesting of RSU's   (1,297)     (1,297)
Common stock issued - compensation plans 46 (46)    
Unpaid dividends accrued     (2,092)   (2,092)
Balance at Dec. 31, 2020 24,206 43,468 342,615 (145,590) 264,699
Net income     155,899   155,899
Dividends paid     (59,104)   (59,104)
Stock-based compensation   8,280     8,280
Vesting of RSU's   (4,801)     (4,801)
Common stock issued - compensation plans 100 (100)    
Unpaid dividends accrued     (1,312)   (1,312)
Balance at Dec. 31, 2021 $ 24,306 $ 46,847 $ 438,098 $ (145,590) $ 363,661