Properties (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Properties
Gain on sale of investments and other assets, net		$ 245	$ 17,198
Summary of properties
Total properties, at cost		1,171,223		$ 928,060
Less: accumulated depreciation		(16,248)		(8,835)
Properties, net		1,154,975		919,225
Property Segment
Summary of properties
Land		295,345		236,545
Land improvements		19,900		11,044
Buildings		661,113		516,117
Furniture & fixtures		$ 19,592		11,980
Property Segment | Minimum
Summary of properties
Building, useful life		30 years
Land improvements, useful life		5 years
Furniture & fixtures, useful life		3 years
Property Segment | Maximum
Summary of properties
Building, useful life		40 years
Land improvements, useful life		10 years
Furniture & fixtures, useful life		7 years
Investment and Servicing Segment
Properties
Gain on sale of investments and other assets, net	$ 17,100
Summary of properties
Land		$ 49,736		39,103
Buildings		120,718		110,815
Building improvements		3,688		1,709
Furniture & fixtures		892		680
Tenant improvements		$ 239		$ 67
Investment and Servicing Segment | Minimum
Summary of properties
Building, useful life		20 years
Building improvements, useful life		7 years
Furniture & fixtures, useful life		3 years
Tenant improvements, useful life		3 years
Investment and Servicing Segment | Maximum
Summary of properties
Building, useful life		40 years
Building improvements, useful life		15 years
Furniture & fixtures, useful life		5 years
Tenant improvements, useful life		5 years