Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Retained interest investments	$ 10,635	$ 10,246
Accounts receivable, net	4,625	4,382
Notes receivable, net	1,926	2,555
Prepaid expenses	5,685	5,849
Straight line rent	3,812	3,732
Other assets	8,789	6,751
Accrued interest receivable for Senior Notes held by SPE	2,938	3,338
Total other assets	$ 38,410	$ 36,853