Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Other Assets
Restricted investments		$ 1,171
Accounts receivable, net	$ 10,578	10,791
Homesite sales receivable	6,456	5,675	$ 4,547	$ 5,211
Notes receivable, net	12,077	10,877
Inventory	2,335	2,026
Prepaid expenses	6,555	7,135
Straight-line rent	2,921	3,174
Operating lease, right-of use assets	888	808
Other assets	6,478	5,743
Retained interest investments	13,092	12,905
Accrued interest receivable for Senior Notes held by SPE	935	2,938
Total other assets	$ 62,315	$ 63,243