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Stock-based Compensation Plans (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock-based Compensation Plans      
Shares available to grant to employees and directors 4,116,931    
Stock Options
     
Stock-based Compensation Plans      
Compensation cost for stock compensation plans $ 0 $ 4,000 $ 74,000
Income tax benefit from stock compensation plans 0 2,000 29,000
Stock Options      
Expiration date of stock options granted 5 years    
Stock options granted during year 0 0 0
Unrecognized compensation cost, net of tax 0    
Total intrinsic value of options exercised 1,907,000 3,000 0
Total intrinsic value of options exercised, tax benefit 742,000 1,000 0
Cash received from options exercised 4,327,000 81,000 0
Average remaining life on stock options outstanding 1 month    
Average remaining life on stock options exercisable 1 month    
Aggregate intrinsic value of stock options outstanding 842,000    
Aggregate intrinsic value of stock options exercisable 842,000    
Stock Options | Director
     
Stock Options      
Requisite service period of stock options granted 6 months    
Stock Options | Employee
     
Stock Options      
Requisite service period of stock options granted 2 years    
Restricted Stock
     
Stock-based Compensation Plans      
Compensation cost for stock compensation plans 768,000 243,000  
Income tax benefit from stock compensation plans 299,000 96,000  
Restricted Stock Awards      
Unrecognized compensation cost, net of tax 1,348,000    
Unrecognized compensation costs, recognized over weighted-average period 2 years 2 months 12 days    
Fair value of shares vested 197,000 243,000  
Tax benefit of shares vested $ 77,000 $ 96,000