Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income		$ (393)	$ 3,189
Unrealized gains on available-for-sale investments:
Unrealized gains arising during the period	[1]	55	111
Reclassification adjustment for amounts included in net income	[1]	61	(6)
Change in fair value of debt attributable to instrument-specific credit risk	[1]	11,623	(945)
Other comprehensive income (loss)	[1]	11,739	(840)
Comprehensive income		11,346	2,349
Less: comprehensive income attributable to noncontrolling interests in consolidated subsidiaries		729	217
Comprehensive income attributable to common shareholders		$ 10,617	$ 2,132

[1] Net of income tax expense (benefit) of $0 and $0 for the three months ended March 31, 2020 and March 31, 2019, respectively.