Acquired In-Place Leases and Above/Below Market Leases Summary of Acquired Lease Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	$ 5,103	$ 7,399
Net of accumulated amortization of other intangible assets	(1,590)	(1,554)
Below Market Lease [Abstract]
Below market leases	70,013	76,502
Accumulated accretion	(27,161)	(28,592)
Acquired lease intangible liabilities, net	42,852	47,910
In-place leases
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	53,967	62,813
Net of accumulated amortization of other intangible assets	(35,336)	(38,279)
Acquired lease intangible assets, net	18,631
Above Market Leases
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	22,500	28,279
Net of accumulated amortization of other intangible assets	(17,397)	(20,880)
Acquired lease intangible assets, net	5,103
Acquired lease intangible assets
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets, net	$ 23,734	$ 31,933