Leasing Real Estate (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property Subject to or Available for Operating Lease [Line Items]
Total real estate investments	$ 1,397,235	$ 1,397,230
Less: Accumulated depreciation	(573,726)	(568,539)
Total real estate investments, net	823,509	828,691
Property Subject to Operating Lease [Member]
Property Subject to or Available for Operating Lease [Line Items]
Land	404,812	404,812
Buildings and improvements	851,967	851,967
Equipment	140,456	140,451
Total real estate investments	1,397,235	1,397,230
Less: Accumulated depreciation	(573,726)	(568,539)
Total real estate investments, net	$ 823,509	$ 828,691