Annual report pursuant to Section 13 and 15(d)

Employment Retirement Benefits (Narrative) (Details)

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Employment Retirement Benefits (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Maximum matching percentage by employer 6.00%    
Contributions to the plan $ 457,000 $ 471,000 $ 479,000
Expected contributions in 2014 49,000    
Level 2 [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Investments used to fund the plan 3,645,000 3,517,000  
Level 3 [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Investments used to fund the plan $ 0 $ 2,030,000