Fair Value Measurements and Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 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	$ 437,449	$ 31,824
Total liabilities	(25,650)	(3,613)
Net asset (fair value)	411,799	28,211
Fair Value | Significant Other Observable Inputs (Level 2)
Assets and Liabilities at Fair Value
Total assets	365,263	22,886
Total liabilities	(20,704)	(3,089)
Net asset (fair value)	344,559	19,797
Fair Value | Significant Unobservable Inputs (Level 3)
Assets and Liabilities at Fair Value
Total assets	72,186	8,938
Total liabilities	(4,946)	(524)
Net asset (fair value)	$ 67,240	$ 8,414