Deferred Costs, Acquired Lease Intangibles and Goodwill - Acquired Leases (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired below-market ground lease, Gross Amount	$ 62,738	$ 62,738
Acquired below-market ground lease, Accumulated Amortization	(1,278)	(426)
Acquired below-market leases, Gross Amount	(134,525)	(134,651)
Acquired below-market leases, Accumulated Amortization	14,306	4,769
Acquired in-place lease value and deferred leasing costs [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	185,717	186,415
Finite-lived intangible assets, Accumulated Amortization	(21,615)	(5,697)
Acquired above-market leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	72,090	72,123
Finite-lived intangible assets, Accumulated Amortization	$ (8,575)	$ (2,858)