Fair Value Measurements - Schedule of Quantitative Information Level 3 Fair Value Measurements (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Contingent Earn-Out Receivable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable input projected revenue	$ 6,900	$ 11,000
Performance weighted average	100.00%	60.00%
Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable input projected revenue	$ 17,500	$ 32,000
Fair value Inputs, discount rate	13.60%	13.60%
Fair value inputs, long-term revenue growth rate		0.00%
Contingent Earn-Out Payable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unobservable input projected revenue		$ 3,400
Fair value Inputs, discount rate		10.00%
Minimum | Contingent Earn-Out Receivable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value Inputs, discount rate	2.41%	125.00%
Minimum | Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value inputs, long-term revenue growth rate	3.00%
Maximum | Contingent Earn-Out Receivable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value Inputs, discount rate	2.64%	10.00%
Maximum | Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value inputs, long-term revenue growth rate	7.10%