Summary of Significant Accounting Policies - Narrative (Detail)	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) segment term	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Treasury yield term				10 years
Additional rent, percentage points used in calculation				6.00%
Non-normal tenant improvements	$ 114,700,000			$ 114,700,000
Impairment charges	$ 0	$ 0		$ 0	$ 0
Number of times lease term, extended | term				4
Effective tax rate	3.30%			2.80%
Amortization of deferred financing costs	$ 2,800,000			$ 8,400,000
Long-term debt	3,940,803,000			3,940,803,000		$ 3,621,942,000
Debt, fair value	4,100,000,000			$ 4,100,000,000
Number of reportable segments | segment				1
Tenant
Summary Of Significant Accounting Policies [Line Items]
Initial cap of non-normal tenant improvements in the first year				$ 100,000,000
Annual increase in non-normal tenant improvements				$ 75,000,000
Master lease, initial lease term				10 years
Additional period of extension in lease contract				5 years
Corporate Services Agreement
Summary Of Significant Accounting Policies [Line Items]
Expenses incurred	$ 400,000		$ 600,000	$ 1,200,000