Organization - Additional Information (Detail) ft² in Millions	9 Months Ended
	Sep. 30, 2015 ft² Property Joint_Ventures State
Organization and Formation of Company [Line Items]
Company's ownership interest in the Operating Partnership	96.20%
Operating Partnership's minimum ownership interest in the limited partnerships	99.00%
Company's ownership interest in the General Partners	100.00%
Limited partners' ownership interest in the Operating Partnership	3.80%
Number of joint ventures | Joint_Ventures	2
Number of industrial properties sold	15
Gross leasable area (GLA) of industrial properties sold | ft²	1.0
Number of industrial properties owned	629
Number of states in which industrial properties are located | State	25
Gross leasable area (GLA) of industrial properties owned | ft²	63.9
2003 Net Lease Joint Venture
Organization and Formation of Company [Line Items]
Noncontrolling equity ownership interest	15.00%
Number of industrial properties sold	1
Gross leasable area (GLA) of industrial properties sold | ft²	0.8
2007 Europe Joint Venture
Organization and Formation of Company [Line Items]
Noncontrolling equity ownership interest	10.00%
Number of industrial properties owned	0
Other Real Estate Partnership
Organization and Formation of Company [Line Items]
Number of limited partnerships	8
Operating Partnership's minimum ownership interest in the limited partnerships	99.00%
General Partners' minimum ownership interest in the limited partnerships	0.01%