Intangible Assets and Liabilities (Details 2) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Amortizable intangible assets
Finite-lived intangible assets, gross	$ 695,333	$ 689,330
Less: accumulated amortization	(177,036)	(164,362)
Finite-lived intangible assets, net	518,297	524,968
Unamortizable Intangible Assets
Goodwill	304	304
Total intangible assets, gross	695,637	689,634
Total intangible assets, net	518,601	525,272
Amortizable intangible liabilities
Finite-lived intangible liabilities, gross	(117,929)	(118,097)
Less: accumulated amortization	23,625	21,396
Finite-lived intangible liabilities, net	(94,304)	(96,701)
Below-market rent
Amortizable intangible liabilities
Finite-lived intangible liabilities, gross	(116,784)	(116,952)
Less: accumulated amortization	23,587	21,364
Finite-lived intangible liabilities, net	(93,197)	(95,588)
Above-market ground lease
Amortizable intangible liabilities
Finite-lived intangible liabilities, gross	(1,145)	(1,145)
Less: accumulated amortization	38	32
Finite-lived intangible liabilities, net	(1,107)	(1,113)
In-place lease and tenant relationships
Amortizable intangible assets
Finite-lived intangible assets, gross	594,160	588,858
Less: accumulated amortization	(153,729)	(143,635)
Finite-lived intangible assets, net	440,431	445,223
Above-market rent intangible assets, net
Amortizable intangible assets
Finite-lived intangible assets, gross	88,889	88,288
Less: accumulated amortization	(22,890)	(20,405)
Finite-lived intangible assets, net	65,999	67,883
Below-market ground lease
Amortizable intangible assets
Finite-lived intangible assets, gross	12,284	12,184
Less: accumulated amortization	(417)	(322)
Finite-lived intangible assets, net	$ 11,867	$ 11,862