Real Estate Investments (Summary of Amortization and Accretion Recognized) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Depreciation and Amortization \| In-Place Leases and Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 2,767	$ 4,887	$ 5,807	$ 11,058
Rental Income \| Above Market Ground Lease
Finite-Lived Intangible Assets [Line Items]
Amortization and (accretion) of above- and below market leases, net	(1,504)	(1,729)	(3,116)	(4,688)
Hotel Expense \| Above Market Ground Lease
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ (113)	$ (113)	$ (225)	$ (225)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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