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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Retained Earnings [Member]
Beginning balance at Dec. 31, 2010 $ 95,365 $ 102 $ 25,164 $ (65) $ 70,164
Beginning balance, shares at Dec. 31, 2010   10,202,000      
Common stock issued on exercise of options 54 0 54 0 0
Common stock issued on exercise of options, shares 7,475 8,000      
Share based compensation expense, net of tax 473 0 473 0 0
Share based compensation expense, net of tax, shares   0      
Excess tax benefit of stock option exercises 27 0 27 0 0
Company repurchase of common stock (4,778) (3) (4,775) 0 0
Company repurchase of common stock, shares (339,384) (339,000)      
Cash dividends on common stock (3,835) 0 0 0 (3,835)
Unrealized holding gains (losses) on marketable securities, net of tax 31 0 0 31 0
Net income 14,318 0 0 0 14,318
Ending balance at Dec. 31, 2011 101,655 99 20,943 (34) 80,647
Ending balance, shares at Dec. 31, 2011   9,871,000      
Common stock issued on exercise of options 1,845 1 1,844 0 0
Common stock issued on exercise of options, shares 131,997 132,000      
Share based compensation expense, net of tax 695 0 695 0 0
Share based compensation expense, net of tax, shares   0      
Excess tax benefit of stock option exercises 295 0 295 0 0
Company repurchase of common stock (60,232) (30) (22,864) 0 (37,338)
Company repurchase of common stock, shares 0 (2,986,000)      
Cash dividends on common stock (3,550) 0 0 0 (3,550)
Unrealized holding gains (losses) on marketable securities, net of tax 57 0 0 57 0
Net income 13,131 0 0 0 13,131
Ending balance at Dec. 31, 2012 53,896 70 913 23 52,890
Ending balance, shares at Dec. 31, 2012   7,017,000      
Common stock issued on exercise of options and vesting of restricted stock units 1,771 2 1,769 0 0
Common stock issued on exercise of options and vesting of restricted stock units, shares   148,000      
Common stock issued on exercise of options, shares 138,298        
Share based compensation expense, net of tax 1,016 0 1,016 0 0
Share based compensation expense, net of tax, shares   0      
Excess tax benefit of stock option exercises 2,083 0 2,083 0 0
Company repurchase of common stock, shares 0        
Cash dividends on common stock (4,056) 0 0 0 (4,056)
Unrealized holding gains (losses) on marketable securities, net of tax (49) 0 0 (49) 0
Net income 17,892 0 0 0 17,892
Ending balance at Dec. 31, 2013 $ 72,553 $ 72 $ 5,781 $ (26) $ 66,726
Ending balance, shares at Dec. 31, 2013   7,165,000