Supplemental Detail for Certain Components of Consolidated Balance Sheets - Acquired Lease Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Acquired lease intangible assets, net
Acquired in-place leases	$ 1,063,600	$ 1,056,715
Accumulated amortization of acquired in-place leases	(287,011)	(264,399)
Acquired above-market leases	309,384	304,548
Accumulated amortization of acquired above-market leases	(68,562)	(62,447)
Acquired lease intangible assets	$ 1,017,411	$ 1,034,417