Rent and Tenant Receivables and Other Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Accounts receivable, net	$ 44,798	$ 66,021
Straight-line rent receivable	161,079	89,355
Deferred costs relating to revolving credit facility, net	26,110	38,199
Prepaid expenses	9,773	15,171
Leasehold improvements, property and equipment, net	18,180	21,351
Restricted escrow deposits	1,190	34,339
Deferred tax asset and tax receivable	25,287	15,924
Program development costs, net	12,855	12,871
Derivative assets, at fair value	1,892	5,509
Other assets	2,473	3,179
Total	303,637	301,919
Allowance for doubtful accounts	6,600	2,500
Deferred Costs and Other Assets, Net [Member] | Program Development Costs [Member]
Property, Plant and Equipment [Line Items]
Reserves related to program development costs		13,100
Managed REITs [Member] | Deferred Costs and Other Assets, Net [Member] | Program Development Costs [Member]
Property, Plant and Equipment [Line Items]
Reserves related to program development costs	34,800	13,100
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Amortization expense	2,200	1,300	$ 7
Accumulated amortization and depreciation	2,600	1,200
Property and Equipment [Member]
Property, Plant and Equipment [Line Items]
Accumulated amortization and depreciation	3,700	1,600
Depreciation expense	2,100	1,600	$ 5
Line of Credit [Member]
Property, Plant and Equipment [Line Items]
Deferred costs relating to revolving credit facility, net	11,410	16,081
Debt outstanding	$ 19,409	$ 10,765