Business Combinations - Allocation of Purchase Price (Detail) - USD ($) $ in Thousands			12 Months Ended
	May. 29, 2015	Oct. 20, 2014	Dec. 31, 2014
KTR Capital Partners and Affiliates [Member]
Business Acquisition [Line Items]
Investments in real estate properties	$ 5,440,923
Intangible assets, net of intangible liabilities	332,708
Accounts receivable and other assets	7,632
Debt, including premium	(735,172)
Accounts payable, accrued expenses and other liabilities	(55,422)
Total estimated purchase price	4,990,669
Noncontrolling interests	(2,253,234)
Common limited partnership units issued in the Operating Partnership	(181,170)
Total purchase price	$ 2,556,265
Prologis North American Industrial Fund [Member]
Business Acquisition [Line Items]
Investments in real estate properties			$ 2,658,252
Intangible assets, net of intangible liabilities			138,185
Cash			87,780
Accounts receivable and other assets			5,664
Debt, including premium			(1,195,213)
Accounts payable, accrued expenses and other liabilities			(57,655)
Total estimated purchase price		$ 46,800	1,100,000
Noncontrolling interests			(554,493)
Total purchase price			$ 1,082,520