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Impairment Charges and Reserves - Summary of Significant Unobservable Inputs (Detail) - Fair Value Measurements [Member] $ in Millions | 9 Months Ended
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Sep. 30, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Preferred equity interests, Fair Value | $ 94.2
Level 3 [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Preferred equity interests, Fair Value | 94.2
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Preferred equity interests, Fair Value | $ 94.2
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] | Discount Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Unobservable inputs rate | 7.90%
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] | Terminal Capitalization Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Unobservable inputs rate | 8.20%
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] | NOI Growth Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Unobservable inputs rate | 0.00%
Unobservable inputs rate | 0.00%
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] | Minimum [Member] | Discount Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Unobservable inputs rate | 6.60%
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] | Minimum [Member] | Terminal Capitalization Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Unobservable inputs rate | 6.60%
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] | Maximum [Member] | Discount Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Unobservable inputs rate | 10.60%
Preferred Equity Interests [Member] | Level 3 [Member] | Discounted Cash Flow [Member] | Maximum [Member] | Terminal Capitalization Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Unobservable inputs rate | 10.50%

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