Subsequent Events - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			2 Months Ended
	Dec. 31, 2014 Property	Dec. 31, 2013 Property	Dec. 31, 2012 Property	Feb. 24, 2015 Property
Subsequent Event [Line Items]
Number of industrial properties sold	25	65	26
Proceeds from sale of industrial properties	$ 94,095	$ 138,769	$ 83,098
Subsequent Events
Subsequent Event [Line Items]
Number of industrial properties sold				6
Proceeds from sale of industrial properties				$ 12,864