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Stock-Based Compensation (Details) (USD $)
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2011
Jun. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Approved and authorized maximum number of shares to be issued 3,000,000       3,000,000  
Compensation expense related to stock based awards outstanding $ 846,000   $ 697,000 $ 1,800,000 $ 2,400,000  
Company granted options to purchase, shares         262,051  
Weighted average fair value of options granted         $ 4.08  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]            
Exercise of stock options, shares 33,513 1,433     35,739 32,124
Proceeds received upon exercise of stock options $ 163,000 $ 3,000     $ 176,000 $ 185,000
Stock Options [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options, expiration period         10 years  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]            
General option terms         6 years 2 months 12 days  
Expected volatility         68.50%  
Risk-free interest rate         1.42%  
Dividend yield         0.00%  
Forfeiture rate applied to options         5.50%  
Stock Options [Member] | Minimum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options, vesting period         3 years  
Stock Options [Member] | Maximum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options, vesting period         5 years