Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Other Assets
Restricted investments	$ 2,353	$ 3,432
Accounts receivable, net	8,537	14,061
Homesite sales receivable	3,760	2,977	$ 2,362	$ 2,585
Claim settlement receivable	2,741	2,679
Notes receivable	2,724	2,265
Income tax receivable	4,513	3,914
Prepaid expenses	7,012	6,751
Straight line rent	3,399	3,581
Operating lease, right-of use assets	744
Investment in unconsolidated joint venture	4,299	1,105
Other assets	6,883	5,069
Retained interest investments	12,053	11,536
Accrued interest receivable for Senior Notes held by SPE	935	2,938
Total other assets	$ 59,953	$ 60,308