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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2014 7,423,000          
Balance at Dec. 31, 2014 $ 115 $ 79,926 $ 6,402 $ (82,501) $ 96,043 $ 99,985
Net income 21,436 21,436
Other comprehensive (loss), net of tax (1,092) $ (1,092)
Exercise of stock options-shares issued including tax benefits (in shares) 21,000         20,250
Exercise of stock options-shares issued including tax benefits 236 $ 236
Restricted stock issued (in shares) 3,000          
Restricted stock issued
Treasury stock repurchases (in shares) (330,000)          
Treasury stock repurchases (19,278) (19,278)
Share-based compensation 267 267
Balance (in shares) at Dec. 31, 2015 7,117,000          
Balance at Dec. 31, 2015 $ 115 80,429 5,310 (101,779) 117,479 101,554
Net income 11,101 11,101
Other comprehensive (loss), net of tax 2,166 $ 2,166
Exercise of stock options-shares issued including tax benefits (in shares) 8,000         7,917
Exercise of stock options-shares issued including tax benefits 91 $ 91
Restricted stock issued (in shares) 5,000          
Restricted stock issued
Treasury stock repurchases (in shares) (733,000)          
Treasury stock repurchases (21,056) (21,056)
Share-based compensation 302 302
Balance (in shares) at Dec. 31, 2016 6,397,000          
Balance at Dec. 31, 2016 $ 115 80,822 7,476 (122,835) 128,580 94,158
Net income 38,899 38,899
Other comprehensive (loss), net of tax (32) $ (32)
Exercise of stock options-shares issued including tax benefits (in shares) 11,000         11,063
Exercise of stock options-shares issued including tax benefits 123 $ 123
Restricted stock issued (in shares) 7,000          
Restricted stock issued
Treasury stock repurchases (in shares) (254,000)          
Treasury stock repurchases (6,348) (6,348)
Share-based compensation 614 614
Balance (in shares) at Dec. 31, 2017 6,161,000          
Balance at Dec. 31, 2017 $ 115 81,559 7,444 (129,183) 167,669 127,604
Cumulative effect adjustment – ASU 2016-09 $ 190 $ 190