Subsequent Events - Additional Information (Details) $ in Thousands		2 Months Ended	12 Months Ended
		Feb. 23, 2017 USD ($) Property	Dec. 31, 2016 USD ($) Property	Dec. 31, 2015 USD ($) Property	Dec. 31, 2014 USD ($) Property	Feb. 21, 2017 USD ($)
Subsequent Event [Line Items]
Number of industrial properties sold | Property			63	66	29
Proceeds from sale of industrial properties	[1]		$ 169,911	$ 158,429	$ 102,596
Subsequent Events
Subsequent Event [Line Items]
Number of industrial properties sold | Property		3
Proceeds from sale of industrial properties		$ 5,500
Subsequent Events | Private Placement Notes 2027
Subsequent Event [Line Items]
Private Placement Notes, face amount						$ 125,000
Private Placement Notes, interest rate						4.30%
Subsequent Events | Private Placement Notes 2029
Subsequent Event [Line Items]
Private Placement Notes, face amount						$ 75,000
Private Placement Notes, interest rate						4.40%
Subsequent Events | Mortgage Loans Payable 2018
Subsequent Event [Line Items]
Extinguishment of debt, amount		692
Subsequent Events | Mortgage Loans Payable 2020
Subsequent Event [Line Items]
Extinguishment of debt, amount		$ 35,416

[1] (A) Gross proceeds from the sale of real estate and gain on sale of real estate includes the sale of several land parcels for years ended December 31, 2015 and 2014.