Fair Value Measurements - Significant Inputs Used in Fair Value Measurement (Details) $ in Thousands	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 55,900
Discount Rate | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (percent)	0.065
Discount Rate | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (percent)	0.148
Discount Rate | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (percent)	0.098
Probability of payment | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (percent)	0
Probability of payment | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (percent)	0.851
Probability of payment | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input (percent)	0.851
Contingent consideration liabilities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 55,900	$ 63,800
Contingent consideration liabilities | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 55,900	$ 63,800