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Fair Value Measurements (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
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Jun. 30, 2014
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Dec. 31, 2013
Fair Value Measurements      
Number of employees covered under life insurance policies 41 41  
Combined face value of life insurance policies $ 38,900,000 $ 38,900,000  
Cash surrender value 3,000,000 3,000,000 2,900,000
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)      
Goodwill impairment 727,000 727,000  
Contingent earn-out obligations
      
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)      
Balance at beginning of year   320,000  
Issuances   200,000  
Balance at end of period 520,000 520,000  
Recurring basis | Total
      
Fair Value Measurements      
Cash and cash equivalents 49,759,000 49,759,000  
Life insurance - cash surrender value 2,972,000 2,972,000  
Contingent earn-out obligations 520,000 520,000  
Recurring basis | Quoted Market Prices In Active Markets for Identical Assets (Level 1)
      
Fair Value Measurements      
Cash and cash equivalents 49,759,000 49,759,000  
Recurring basis | Significant Other Observable Inputs (Level 2)
      
Fair Value Measurements      
Life insurance - cash surrender value 2,972,000 2,972,000  
Recurring basis | Significant Unobservable Inputs (Level 3)
      
Fair Value Measurements      
Contingent earn-out obligations $ 520,000 $ 520,000