Segment Information - Reconciliation of Consolidated NOI to Consolidated Net Income (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 14, 2016	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting [Abstract]
Consolidated net operating income		$ 81,727	$ 89,708
Less:
Interest expense		(23,691)	(28,176)
Interest expense - amortization of deferred financing costs		(774)	(1,079)
Interest expense - financing obligation		(281)	(286)
Depreciation and amortization		(48,873)	(51,111)
General and administrative expenses		(9,120)	(8,636)
Equity in income (loss) of Real Estate Ventures		(403)	131
Provision for impairment		(7,390)	(1,726)
Loss on early extinguishment of debt	$ (66,590)	(66,590)	0
Plus:
Interest income		320	750
Net gain on disposition of real estate		115,456	9,019
Net gain on real estate venture transactions		5,929	0
Net income		$ 46,310	$ 8,594