Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Intangible assets and goodwill	$ 12,100			$ 12,100
Intangible assets	4,300			4,300
Goodwill	7,800			7,800
Accumulated amortization of identified intangible assets	2,900			2,900
Cash and cash equivalents, restricted cash	5,300			5,300
Deferred financing costs, net	24,700			23,700
Proceeds from insurance claims, operating activities	3,031	$ 4,625
Proceeds from insurance claims, investing activities	265	458
Reported Value Measurement
Significant Accounting Policies [Line Items]
Mortgage notes payable fair value	2,263,600			2,193,700
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Mortgage notes payable fair value	2,239,200			2,184,000
Leases, Acquired-in-Place
Significant Accounting Policies [Line Items]
Intangible assets	79,700			76,700
Accumulated amortization of identified intangible assets	76,600			$ 76,500
Accounting Standard Update 2017-01
Significant Accounting Policies [Line Items]
Capitalized transaction costs	$ 1,000
Accounting Standard Update 2016-15
Significant Accounting Policies [Line Items]
Proceeds from insurance claims, operating activities		(500)
Proceeds from insurance claims, investing activities		$ 500
Accounting Standards Update 2014-09
Significant Accounting Policies [Line Items]
Retained Earnings			$ (15,200)