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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, 2016 $ 24,034 $ 27,211 $ 293,400 $ (78,745) $ 265,900
Net income     52,142   52,142
Dividends paid     (23,905)   (23,905)
Stock-based compensation   3,659     3,659
Exercise of stock options and vesting of RSU's   (2,483)     (2,483)
Common stock issued - compensation plans 58 (58)    
Unpaid dividends accrued     (314)   (314)
Repurchase of 1,319,708 shares of common stock       (64,850) (64,850)
Balance at Dec. 31, 2017 24,092 28,329 321,323 (143,595) 230,149
Net income     50,933   50,933
Dividends paid     (19,201)   (19,201)
Stock-based compensation   5,809     5,809
Vesting of RSU's   (816)     (816)
Common stock issued - compensation plans 31 (31)    
Unpaid dividends accrued     (405)   (405)
Adoption of New Accounting Standard     (2,227)   (2,227)
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