Business Combinations (Transactions Related to Acquisitions) (Details) - USD ($) $ in Thousands		1 Months Ended	9 Months Ended
	Feb. 12, 2016	Sep. 30, 2016	Sep. 30, 2016
Liabilities:
Proceeds to acquire businesses, gross	$ 2,500
Business Combination Achieved in Stages [Member]
Business Acquisition [Line Items]
Fair value of our equity interest before business combination	22,514
Gain recognized on equity interest remeasured to fair value	37,383
Assets:
Property	58,665
Unamortized lease costs	8,936
Accrued rent and accounts receivable	102
Cash and cash equivalents	3,555
Other, net	4,992
Liabilities:
Debt, net	(48,727)
Accounts payable and accrued expenses	(1,339)
Other, net	(3,670)
Total net assets	22,514
Proceeds to acquire businesses, gross	$ 2,500
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Fair value of our equity interest before business combination		$ 13,500	$ 13,579
Fair value of consideration transferred			443,745
Acquisition costs (included in operating expenses)			660
Gain on acquisition		9,000	9,015
Assets:
Property		432,205	432,205
Unamortized lease costs		81,801	81,801
Accrued rent and accounts receivable		122	122
Cash and cash equivalents		556	556
Other, net		6,812	6,812
Liabilities:
Accounts payable and accrued expenses		(6,383)	(6,383)
Other, net		(62,254)	(62,254)
Total net assets		$ 452,859	$ 452,859