Subsequent Events - Additional Information (Detail) $ in Thousands	1 Months Ended	9 Months Ended
	Oct. 30, 2015 USD ($) Property	Sep. 30, 2015 USD ($) Property	Sep. 30, 2014 USD ($)
Subsequent Event [Line Items]
Number of industrial properties acquired		3
Purchase price of acquisitions | $		$ 73,179	$ 53,211
Number of industrial properties sold		15
Proceeds from the sale of industrial properties | $		$ 50,060
Subsequent Events
Subsequent Event [Line Items]
Number of industrial properties acquired	3
Number of land parcels acquired	2
Purchase price of acquisitions | $	$ 71,177
Number of industrial properties sold	29
Proceeds from the sale of industrial properties | $	$ 28,225
Extinguishment of mortgage debt | $	$ 22,910