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Income Taxes (Details 4) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Reconciliation of the beginning and ending liabilities for unrecognized tax benefits      
Balance at beginning of period $ 655,000 $ 567,000  
Gross increases in current period tax positions 132,000 186,000  
Gross increases in prior period tax positions 55,000 134,000  
Gross decreases in prior period tax positions (185,000) (232,000)  
Balance at end of period 657,000 655,000 567,000
Accrued interest and penalties at end of period 189,000 185,000  
Total liability for unrecognized tax benefits 846,000 840,000  
Unrecognized tax benefits      
Interest and penalties charged to income tax expense as a result of the unrecognized tax benefits $ 0 $ 200,000 $ 100,000