Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
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	2,800		2,800		2,600
Amortization of in-place leases	1,376	$ 616	2,139	$ 1,950
Cash and cash equivalents, restricted cash	5,300		5,300		5,000
Deferred financing costs, net	18,800		18,800		19,700
Accumulated amortization for deferred financing costs	30,700		30,700		33,700
Identified Intangible Assets
Significant Accounting Policies [Line Items]
Amortization of in-place leases	100	$ 100	$ 200	$ 300
Primary Beneficiary
Significant Accounting Policies [Line Items]
Ownership percentage			92.20%
Reported Value Measurement [Member]
Significant Accounting Policies [Line Items]
Mortgage notes payable fair value	2,100,000		$ 2,100,000		2,100,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Mortgage notes payable fair value	$ 2,100,000		$ 2,100,000		$ 2,200,000