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Stock-Based Compensation (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares remain available for future issuances under stock-based compensation plans 106,679   106,679  
Proceeds from exercise of stock options     $ 427,000 $ 37,000
Restricted stock awards issued, net of forfeitures     1,100,000 1,200,000
Employee Stock Option
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share based compensation 4,000 21,000 20,000 42,000
Tax benefit 0      
Intrinsic value of options exercised     201,000 9,000
Proceeds from exercise of stock options     427,000 37,000
Employee Stock Option | Option 1
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested ratably     3 years  
Expired ratably     5 years  
Employee Stock Option | Option 2
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested ratably     4 years  
Expired ratably     10 years  
Restricted Stock Awards | Award 1
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested ratably     5 years  
Restricted Stock Awards | Award 2
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested ratably     4 years  
Restricted and Unrestricted Stock
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share based compensation 263,000 471,000 539,000 722,000
Tax benefit 92,000 165,000 189,000 253,000
Unrecognized compensation expense related to non-vested stock option $ 1,500,000   $ 1,500,000  
Weighted average period     2 years 0 months 4 days