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Fair Value Measurements - Schedule of Liability Measured at Fair Value using Level 3 Inputs (Details) - Level 3
$ in Thousands
6 Months Ended
Jun. 30, 2015
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance as of January 1, 2015 $ (900)
Fair value adjustment to contingent consideration included in general and administrative expense (100)
Balance as of June 30, 2015 $ (1,000)