Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Assets Disclosure [Abstract]
Retained interest investments	$ 10,246	$ 9,932
Accounts receivable, net	4,382	4,385
Prepaid expenses	5,849	4,783
Straight line rent	3,732	2,869
Income tax receivable	2,275	778
Other assets	8,822	6,305
Accrued interest receivable for Senior Notes held by special purpose entity	3,338	2,938
Total other assets	$ 38,644	$ 31,990