Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Intangible assets and goodwill	$ 12,100		$ 12,100		$ 12,100
Intangible assets	4,300		4,300		4,300
Goodwill	7,800		7,800		7,800
Accumulated amortization of identified intangible assets	2,900		2,900		2,800
Amortization of in-place leases	958	$ 428	1,990	$ 763
Cash and cash equivalents, restricted cash	5,300		5,300
Deferred financing costs, net	17,800		$ 17,800		18,900
Primary Beneficiary
Significant Accounting Policies [Line Items]
Ownership percentage			93.70%
Reported Value Measurement [Member]
Significant Accounting Policies [Line Items]
Mortgage notes payable fair value	2,072,300		$ 2,072,300		2,110,200
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Mortgage notes payable fair value	2,106,400		2,106,400		2,081,200
Leases, Acquired-in-Place
Significant Accounting Policies [Line Items]
Intangible assets	76,700		76,700
Accumulated amortization of identified intangible assets	$ 75,900		$ 75,900		$ 74,000