Supplemental Detail for Certain Components of Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Acquired lease intangible assets, net
Acquired in-place leases	$ 1,034,959	$ 1,005,244
Accumulated amortization of acquired in-place leases	(220,690)	(177,722)
Acquired above-market leases	288,133	252,581
Accumulated amortization of acquired above-market leases	(50,689)	(40,379)
Acquired lease intangible assets	$ 1,051,713	$ 1,039,724