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Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Treasury Stock [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance at Dec. 31, 2017 $ 129,453 $ (337)   $ 143,467 $ 272,583
Net income       23,477 23,477
Payment of dividends       (440) (440)
Stock-based compensation 964 204     1,168
Other 1   (1)  
Balance at Jun. 30, 2018 130,417 (132)   166,503 296,788
Balance at Mar. 31, 2018 130,379 (239)   150,875 281,015
Net income   15,848 15,848
Payment of dividends   (220) (220)
Stock-based compensation 38 106   144
Other 1   1
Balance at Jun. 30, 2018 130,417 (132)   166,503 296,788
Balance at Dec. 31, 2018 130,778 (132) 176,345 306,991
Net income 4,155 4,155
Payment of dividends (439) (439)
Stock-based compensation 1,642 1,642
Changes in fair value of hedges, net of tax (2,365) (2,365)
Repurchase of common stock (1,521) (1,521)
Balance at Jun. 30, 2019 132,420 (1,653) (2,365) 180,061 308,463
Balance at Mar. 31, 2019 132,275 (196) (1,078) 178,199 309,200
Net income 2,081 2,081
Payment of dividends (219) (219)
Stock-based compensation 145 145
Changes in fair value of hedges, net of tax (1,287) (1,287)
Repurchase of common stock (1,457) (1,457)
Balance at Jun. 30, 2019 $ 132,420 $ (1,653) $ (2,365) $ 180,061 $ 308,463