Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Significant Accounting Policies [Line Items]
Consolidation percentage if not wholly owned but controlled	Less than 100% of the equity
Percentage of occupancy for stabilization	90.00%
Period after completion of construction for commencement of depreciation	1 year
Estimated useful lives	40 years
Average lease term period	6 years
Depreciation commencement description	Depreciation commences when the asset is ready for its intended use, which we define as the earlier of stabilization (90% occupied) or one year after completion of construction.
Maximum length of time hedged in future cash flow hedge	10 years
Noncontrolling interests in real estate entities	100.00%
Percentage of taxable income distribute	100.00%
Unamortized debt issuance expense	$ 52.3	$ 43.2
Capital Improvements [Member] | Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Capital Improvements [Member] | Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives	7 years
Standard Tenant Improvements [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives	10 years
Depreciable and Land Improvements [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives	25 years
Operating Properties [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives	30 years