Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Investment income, net
Interest and dividend income	$ 4,548	$ 189
Accretion income	922	464
Realized gain on the sale of investments	3,122	0
Other-than-temporary impairment loss	(366)	0
Total net investment income from available-for-sale securities	8,226	653
Interest income from investments in SPEs	2,051	2,050
Interest accrued on notes receivable and other interest	79	27
Total investment income, net	10,356	2,730
Interest expense
Interest expense and amortization of discount and issuance costs for Senior Notes issued by SPE	(2,193)	(2,190)
Interest expense	(850)	(845)
Total interest expense	(3,043)	(3,035)
Claim settlement	0	12,548
Other, net
Accretion income from retained interest investments	263	241
Hunting lease income	139	138
Other income, net	3,649	73
Other, net	4,051	452
Total other income, net	$ 11,364	$ 12,695