Other Expense, Net - Components (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Investment income, net
Interest and dividend income	$ 12	$ 1,043
Accretion income	12	17
Net realized gain (loss) on the sale of investments	17	(48)
Unrealized loss on investments, net	(1,049)	(4,761)
Interest income from investments in SPEs	2,043	2,046
Interest earned on notes receivable and other interest	160	94
Total investment income (loss), net	1,195	(1,609)
Interest expense
Interest expense and amortization of discount and issuance costs for Senior Notes issued by SPE	(2,205)	(2,202)
Other interest expense	(1,466)	(1,143)
Total interest expense	(3,671)	(3,345)
Gain on land contribution and mitigation credits	120	4,277
Gain on contribution to equity method investment	120	4,277
Other income (expense), net
Accretion income from retained interest investments	361	344
Gain on insurance recovery	866
Loss from hurricane damage	(7)	(55)
Miscellaneous income (expense), net	74	(34)
Other income, net	1,294	255
Total other expense, net	$ (1,062)	$ (422)