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Stock Based Compensation (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized 3,000,000   3,000,000    
Tax benefit recorded to additional paid in capital     $ 285,000    
Restricted Stock [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Surrendered shares for tax withholding     14,429 36,329  
Compensation costs 135,000 86,000 439,000 324,000  
Tax benefit recorded to additional paid in capital     58,000    
Unrecognized compensation expense 1,080,000 594,000 1,080,000 594,000  
Expected recognition period     1 year 7 months 6 days    
Restricted Stock Rollforward, Shares          
Unvested balance at December 31, 2013     98,281    
Granted     81,763    
Vested     (53,884)    
Forfeited     0    
Unvested balance at Period End 126,160   126,160    
Weighted Average Grant Date Fair Value of Restricted Stock          
Unvested balance at December 31, 2013, USD per share $ 10.75   $ 10.75   $ 8.91
Granted, USD per share     $ 12.04    
Vested, USD per share     $ 9.81    
Forfeited, USD per share     $ 0.00    
Unvested balance at Period End, USD per share $ 10.75   $ 10.75   $ 8.91
Stock Options [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Surrendered shares for tax withholding     38,690    
Tax benefit related to disqualified dispositions     311,000    
Credit to income tax expense     84,000    
Tax benefit recorded to additional paid in capital     227,000    
Stock Options Rollforward, Shares          
Outstanding at December 31, 2013     227,750    
Exercised     (224,050)    
Granted     0    
Forfeited     0    
Outstanding at Period End 3,700   3,700    
Exercisable at Period End 3,700   3,700    
Weighted Average Exercise Price of Stock Options          
Outstanding at December 31, 2013, USD per share     $ 3.57    
Exercised, USD per share     $ 3.54    
Granted, USD per share     $ 0.00    
Forfeited, USD per share     $ 0.00    
Outstanding at Period End, USD per share $ 5.71   $ 5.71    
Exercisable at Period End, USD per share $ 5.71   $ 5.71    
Stock Options [Member] | Selling, General and Administrative Expenses [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation costs   $ 5,000 $ 0