Acquired Lease Intangibles (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
AcquiredLeaseIntangiblesLineItems [Line Items]
Acquired lease intangibles, net	$ 14,494	$ 15,976
Acquired below-market lease intangibles, net	4,115	3,507
Leases Acquired In Place
AcquiredLeaseIntangiblesLineItems [Line Items]
Acquired lease intangible assets	22,109	27,821
Acquired lease intangible assets, accumulated depreciation	(11,790)	(14,096)
Below Market Leases
AcquiredLeaseIntangiblesLineItems [Line Items]
Acquired lease intangible assets	358	358
Acquired lease intangible assets, accumulated depreciation	(70)
Acquired lease intangible liabilities	4,201	6,286
Acquired lease intangible liabilities, accumulated amortization	(1,818)	(2,779)
Above Market Leases
AcquiredLeaseIntangiblesLineItems [Line Items]
Acquired lease intangible assets	3,597	3,774
Acquired lease intangible assets, accumulated depreciation	$ (1,914)	$ (1,881)