Commitments and Contingencies - Additional Information (Details) $ in Thousands, ft² in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) ft² Property	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of leased properties granting the tenants options to purchase the property | Property	2
Outstanding amount of letters of credit and performance bonds in the aggregate	$ 16,939
Number of industrial properties under construction | Property	9
Gross leasable area (GLA) of industrial properties under construction | ft²	2.4
Estimated total investment	$ 167,200
Estimated total investment remaining to be funded	100,100
Operating and ground lease expense	$ 1,380	$ 1,281	$ 1,300