Other Liabilities and Deferred Credits (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of Other Liabilities [Line Items]
Acquired below market leases, net	$ 52,804	$ 54,350
Prepaid rent and deferred revenue	5,279	6,383
Deferred rent expense and lease intangible	969	1,008
Deferred compensation	660	637
Deferred tax liability	320	320
Straight-line rent liability	110	63
Other liabilities	39	50
Total other liabilities and deferred credits	$ 60,181	$ 62,811