Fair Value Measurements and Disclosures (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets and Liabilities at Fair Value
Impairment Measurement Input	17.00%
Fair Value
Assets and Liabilities at Fair Value
Total assets	$ 237,038	$ 31,824
Total liabilities	(60,820)	(3,613)
Net asset (fair value)	176,218	28,211
Fair Value | Significant Other Observable Inputs (Level 2)
Assets and Liabilities at Fair Value
Total assets	202,183	22,886
Total liabilities	(52,923)	(3,089)
Net asset (fair value)	149,260	19,797
Fair Value | Significant Unobservable Inputs (Level 3)
Assets and Liabilities at Fair Value
Total assets	34,855	8,938
Total liabilities	(7,897)	(524)
Net asset (fair value)	$ 26,958	$ 8,414