Prepaid Expenses and Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Costs, Capitalized and Other Assets Disclosure [Line Items]
Leasing commissions, net of accumulated amortization of $16,829 and $13,015, respectively	$ 18,329	$ 16,738
Acquired above market leases, net	11,483	16,536
Acquired in-place leases, net	34,308	28,862
Lease incentives, net of accumulated amortization of $2,220 and $1,850, respectively	1,480	1,850
Other intangible assets, net of accumulated amortization of $4,239 and $3,848, respectively	960	986
Debt issuance costs, net of accumulated amortization of $2,374 and $2,188, respectively	3,651	3,280
Purchase deposit		3,000
Prepaid expenses, deposits and other	3,459	3,172
Total prepaid expenses and other assets	$ 73,670	$ 74,424