Other Income, Net - Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment income, net
Interest and dividend income	$ 1,121	$ 7,375	$ 9,060
Accretion income	74	84	684
Net realized (loss) gain on the sale of investments	(48)	87	(973)
Other-than-temporary impairment loss			(2,330)
Unrealized loss on investments, net	(4,688)	(5,342)	(3,035)
Interest income from investments in SPEs	8,180	8,190	8,197
Interest accrued on notes receivable and other interest	344	320	547
Total investment income, net	4,983	10,714	12,150
Interest expense
Interest expense and amortization of discount and issuance costs for Senior Notes issued by SPE	(8,813)	(8,801)	(8,788)
Other interest expense	(4,751)	(3,501)	(3,052)
Total interest expense	(13,564)	(12,302)	(11,840)
Gain on land contribution to equity method investment	19,983	2,317
Other income (expense), net
Accretion income from retained interest investments	1,391	1,325	1,232
Gain on insurance recovery	690	5,314	7,199
Loss from hurricane damage	(1,123)	(2,704)	(8,628)
Miscellaneous income, net	371	198	1,349
Other income, net	1,329	4,133	1,152
Total other income, net	$ 12,731	$ 4,862	$ 1,462