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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 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 | 3,000 |  |  | 2,900
Cash and cash equivalents, restricted cash | 5,300 |  |  | 5,300
Deferred financing costs, net | 23,600 |  |  | 23,700
Capitalized transaction costs | 1,500 |  |  |
Proceeds from insurance claims, operating activities | (3,353) | $ (134) |  |
Proceeds from insurance claims, investing activities | 6,615 | 1,547 |  |
Distributions of income from unconsolidated joint ventures | 2,869 | 2,071 |  |
Distributions in excess of accumulated earnings |  |  | $ (227,166) | (211,980)
Reported Value Measurement |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Mortgage notes payable fair value | 2,238,400 |  |  | 2,193,700
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Mortgage notes payable fair value | 2,200,800 |  |  | 2,184,000
Leases, Acquired-in-Place |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Intangible assets | 84,900 |  |  | 76,700
Accumulated amortization of identified intangible assets | $ 81,700 |  |  | $ 76,500
Accounting Standards Update 2016-15 |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Distributions of capital from unconsolidated joint ventures |  | $ 600 |  |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Distributions in excess of accumulated earnings |  |  | $ (15,186) |

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