CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 100,977	$ 61,002
Bond related changes:
Net unrealized gains	1,244	5,620
Reclassification of fair value gains on sold or redeemed bonds into the Consolidated Statements of Operations	(28,301)	(21,875)
Reclassification of credit-related gains to the Consolidated Statements of Operations related to bond investments assessed as other-than-temporary-impairment ("OTTI")	0	6
Reinstatement of fair value gains related to bond investments due to deconsolidation of consolidated property partnerships	0	9,415
Income tax expense	(2,902)	0
Net change in other comprehensive loss due to bonds, net of taxes	(29,959)	(6,834)
Foreign currency translation adjustment	(105)	3,378
Other comprehensive loss	(30,064)	(3,456)
Comprehensive income	$ 70,913	$ 57,546