Other Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Other Assets
Lease inducements, net of accumulated amortization of $3,632 and $4,718 in 2013 and 2012, respectively	$ 9,955	$ 11,089
FF&E and leasehold improvements, net of accumulated depreciation of $19,406 and $18,877 in 2013 and 2012, respectively	4,985	4,814
Prepaid expenses and other assets	6,373	2,044
Predevelopment costs and earnest money	1,881	3,284
Loan closing costs, net of accumulated amortization of $2,530 and $2,624 in 2013 and 2012, respectively	2,940	3,704
Intangible Assets:
In-place leases, net of accumulated amortization of $11,432 and $5,729 in 2013 and 2012, respectively	50,006	21,637
Above market leases, net of accumulated amortization of $10,233 and $9,424 in 2013 and 2012, respectively	7,167	6,892
Goodwill	4,147	4,751	5,039	5,155
Total Other Assets	87,454	58,215
Accumulated amortization, incentives to lessees	3,632	4,718
Accumulated depreciation on FF&E and leasehold improvements	19,406	18,877
Accumulated amortization on loan closing costs	2,530	2,624
Accumulated amortization of in place leases	11,432	5,729
Accumulated amortization of finite-lived intangible assets, above market leases	$ 10,233	$ 9,424