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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive (Loss) Income
Retained Earnings
Balance at Dec. 31, 2009 $ 94,932 $ 105 $ 28,358 $ 256 $ 66,213
Balance, shares at Dec. 31, 2009   10,466,000      
Common stock issued on exercise of options, shares 2,750 3,000      
Common stock issued on exercise of options 17 0 17 0 0
Stock option compensation expense, net of tax, shares   0      
Stock option compensation expense, net of tax 192 0 192 0 0
Tax benefit of stock option exercises 9 0 9 0 0
Company repurchase of common stock, shares (266,672) (267,000)      
Company repurchase of common stock, value (3,415) (3) (3,412) 0 0
Cash dividends on common stock (3,402) 0 0 0 (3,402)
Unrealized holding gains (losses) on marketable securities, net of tax (76) 0 0 (76) 0
Reclassification of realized gains on sale of marketable securities, net of tax (245) 0 0 (245) 0
Net income 7,353 0 0 0 7,353
Balance at Dec. 31, 2010 95,365 102 25,164 (65) 70,164
Balance, shares at Dec. 31, 2010   10,202,000      
Common stock issued on exercise of options, shares 7,475 8,000      
Common stock issued on exercise of options 54 0 54 0 0
Stock option compensation expense, net of tax, shares   0      
Stock option compensation expense, net of tax 473 0 473 0 0
Tax benefit of stock option exercises 27 0 27 0 0
Company repurchase of common stock, shares (339,384) (339,000)      
Company repurchase of common stock, value (4,778) (3) (4,775) 0 0
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
Reclassification of realized gains on sale of marketable securities, net of tax 0        
Net income 14,318 0 0 0 14,318
Balance at Dec. 31, 2011 101,655 99 20,943 (34) 80,647
Balance, shares at Dec. 31, 2011   9,871,000      
Common stock issued on exercise of options, shares 131,997 132,000      
Common stock issued on exercise of options 1,845 1 1,844 0 0
Stock option compensation expense, net of tax, shares   0      
Stock option compensation expense, net of tax 695 0 695 0 0
Tax benefit of stock option exercises 295 0 295 0 0
Company repurchase of common stock, shares 0 (2,986,000)      
Company repurchase of common stock, value (60,232) (30) (22,864) 0 (37,338)
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
Reclassification of realized gains on sale of marketable securities, net of tax 0        
Net income 13,131 0 0 0 13,131
Balance at Dec. 31, 2012 $ 53,896 $ 70 $ 913 $ 23 $ 52,890
Balance, shares at Dec. 31, 2012   7,017,000