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Employee Benefit Plans (Details 2) (Pension, USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pension
      
Defined Benefit Plan Disclosure      
Minimum required contribution for the 2014 plan year $ 1,300,000    
Change in projected benefit obligation:      
Balance at the beginning of the period 15,342,000 14,217,000  
Service cost 1,174,000 1,168,000 931,000
Interest cost 646,000 667,000 604,000
Actuarial gain (1,991,000) (458,000)  
Benefits paid (319,000) (252,000)  
Balance at the end of the period 14,852,000 15,342,000 14,217,000
Change in plan assets:      
Fair value at the beginning of the period 11,707,000 10,034,000  
Actual return on plan assets 2,220,000 1,193,000  
Employer contribution   766,000  
Expenses paid (76,000) (34,000)  
Benefits paid (319,000) (252,000)  
Fair value at the end of the period 13,532,000 11,707,000 10,034,000
Funded status at end of year (1,320,000) (3,635,000)  
Accumulated benefit obligation $ 12,298,000 $ 12,564,000