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Fair Value Measurements (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2017
USD ($)
Jun. 30, 2017
USD ($)
item
Dec. 31, 2016
USD ($)
Fair Value Measurements      
Number of employees covered under life insurance policies | item   46  
Combined face value of life insurance policies   $ 41,400  
Cash surrender value   3,500 $ 3,700
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)      
Goodwill, Impairment Loss $ 1,100 1,105  
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 2,531 2,531  
Issuances   11,755  
Adjustments to fair value   624  
Balance at end of period   14,910  
Recurring basis | Total      
Fair Value Measurements      
Cash and cash equivalents   34,465  
Life insurance - cash surrender value   3,501  
Contingent earn-out obligations   14,910  
Recurring basis | Quoted Market Prices In Active Markets for Identical Assets (Level 1)      
Fair Value Measurements      
Cash and cash equivalents   34,465  
Recurring basis | Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2)      
Fair Value Measurements      
Life insurance - cash surrender value   3,501  
Recurring basis | Significant Unobservable Inputs (Level 3)      
Fair Value Measurements      
Contingent earn-out obligations   $ 14,910  
Non recurring basis | Significant Unobservable Inputs (Level 3)      
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)      
Goodwill, Impairment Loss $ 1,100