Other Income - Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Investment income, net
Interest and dividend income	$ 67	$ 2,302	$ 1,111	$ 4,115
Accretion income	30	23	47	84
Net realized loss on the sale of investments			(48)	(2)
Unrealized (loss) gain on investments, net	(142)	(1,915)	(4,903)	133
Interest income from investments in SPEs	2,045	2,048	4,091	4,096
Interest accrued on notes receivable and other interest	55	77	148	154
Total investment income, net	2,055	2,535	446	8,580
Interest expense
Interest expense and amortization of discount and issuance costs for Senior Notes issued by SPE	(2,203)	(2,200)	(4,405)	(4,399)
Other interest expense	(1,187)	(824)	(2,329)	(1,567)
Total interest expense	(3,390)	(3,024)	(6,734)	(5,966)
Other income (expense), net
Gain on land contribution to equity method investment	15,338		19,616	1,472
Accretion income from retained interest investments	340	327	685	647
Gain on insurance recovery		3,792		4,071
Loss from hurricane damage	447	805	502	1,127
Miscellaneous income (expense), net	246	(31)	210	(84)
Other income, net	15,477	3,283	20,009	4,979
Total other income, net	$ 14,142	$ 2,794	$ 13,721	$ 7,593