Investment in Real Estate - Additional Informational (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended						0 Months Ended		2 Months Ended
	Dec. 31, 2013 Property sqft	Dec. 31, 2012 sqft Parcels Property	Dec. 31, 2011 Property Parcels sqft	Dec. 31, 2013 Discontinuing operations [Member]	Dec. 31, 2012 Discontinuing operations [Member]	Dec. 31, 2011 Discontinuing operations [Member]	Feb. 13, 2012 2003 Net Lease Joint Venture [Member] Property	May 26, 2011 2003 Net Lease Joint Venture [Member] Property	Feb. 28, 2014 2003 Net Lease Joint Venture [Member] Property sqft
Real Estate Investments [Line Items]
Number of industrial properties acquired	2	1	1				1	1
Number of industrial properties with 100% LLC interest acquired	1
Gross leasable area (GLA) of industrial properties acquired	1,100,000	400,000	700,000
Number of acquired industrial properties that are vacant	1
Equity interest acquired	100.00%						85.00%	85.00%
Carrying value of mortgage loan assumed from acquisition		$ 12,026	$ 24,417
Cash payment of acquisition		8,324	5,277
Percentage of consideration paid of net fair value of acquisition		85.00%	85.00%
Approximate gain due to the difference between carrying value and fair value of acquisition		776	689
Purchase price of land parcels		40,003
Purchase price of acquisitions	72,812	21,819	30,625
Capitalization rate used for calculating estimated fair value of industrial properties acquired		7.30%	8.40%
Number of industrial properties sold	65	26	34						2
Gross leasable area (GLA) of industrial properties sold	2,800,000	4,100,000	2,900,000						1,600,000
Gain on sale of real estate	33,687	16,535	20,184	32,657	12,758	18,814
Number of sold properties included in discontinued operations	65	26	34
Number of land parcels sold		1	1
Gross Proceeds From Sale Of Industrial Properties And Land Parcels	138,769	83,098	81,693
Gross leasable area (GLA) of industrial property transferred to lender			400,000
Number of industrial properties transferred to lender			1
Notes receivable outstanding	52,605	40,771
Net discount of notes receivable outstanding	191	255
Fair value of notes receivable	$ 53,482	$ 44,352