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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, 2013 7,984,000          
Balance at Dec. 31, 2013 $ 114 $ 78,811 $ 6,160 $ (51,691) $ 82,552 $ 115,946
Net income         13,491 13,491
Other comprehensive income, net of tax     242     $ 242
Exercise of stock options-shares issued including tax benefits (in shares) 77,000         77,708
Exercise of stock options-shares issued including tax benefits $ 1 845       $ 846
Restricted stock issued (in shares) 5,000          
Treasury stock repurchases (in shares) (643,000)          
Treasury stock repurchases       (30,810)   (30,810)
Share-based compensation   270       270
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 income, 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          
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 income, 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          
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