Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 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	2,700		2,700		2,600
Amortization of in-place leases	428	$ 669	763	$ 1,334
Cash and cash equivalents, restricted cash	5,300		5,300		5,000
Deferred financing costs, net	18,900		18,900		19,700
Debt, secured and unsecured	2,100,000		2,100,000		2,100,000
Accumulated amortization for deferred financing costs	35,600		35,600		33,700
Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Mortgage notes payable fair value	2,200,000		2,200,000		$ 2,200,000
Identified Intangible Assets
Significant Accounting Policies [Line Items]
Amortization of in-place leases	$ 100	$ 100	$ 100	$ 100
Primary Beneficiary
Significant Accounting Policies [Line Items]
Ownership percentage			92.20%