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Fair Value Measurements - Schedule of Changes in Level 3 Liabilities (Details) - Significant Unobservable Inputs (Level 3)
$ in Thousands
6 Months Ended
Jun. 30, 2017
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance $ 2,081
Contingent consideration 585
Change in fair value of contingent consideration 160
Ending balance $ 2,826