Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014 sqft Property
Commitments and Contingencies Disclosure [Abstract]
Number of industrial properties committed to development	5
Gross leasable area (GLA) of industrial properties committed to development	1,200,000
Estimated total construction costs	$ 64,700
Estimated total construction costs remaining to be funded	$ 44,200