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Fair Value Measurements - Rollforward of the Fair Value of the Assets Determined using Level 3 Inputs (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Roll forward of the fair value of the Company's investments whose fair value was determined using Level 3 inputs  
Balance at the beginning of the period $ 34,353
Balance at the end of the period 41,153
Change In The Fair Value Of Contingent Consideration  
Roll forward of the fair value of the Company's investments whose fair value was determined using Level 3 inputs  
Change in the fair value $ 6,800