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Impairment Charges - Impairment Charges Measured at Fair Value of Real Estate on Non-Recurring Basis (Detail) - Fair Value Measurements [Member] $ in Millions | 9 Months Ended
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Sep. 30, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Long-lived assets held and used | $ 10.0
Long-lived assets held and used, Total Impairment Charges | 7.3
Level 1 [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Long-lived assets held and used | 0.0
Level 2 [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Long-lived assets held and used | 0.0
Level 3 [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Long-lived assets held and used | $ 10.0

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