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Impairment Charges and Reserves - Impairment Charges and Reserves Measured at Fair Value of Real Estate on Non-Recurring Basis (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets held and used, Total Impairment Charges $ 7,300 $ 3,200 $ 600
Preferred equity interests, Total Impairment Charges 0 19,393 15,544
Fair Value Measurements [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets held and used 10,000 11,500 5,000
Preferred equity interests   94,200 108,500
Long-lived assets held and used, Total Impairment Charges 7,300 5,200 3,400
Preferred equity interests, Total Impairment Charges   19,400 15,500
Fair Value Measurements [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets held and used 0 0 0
Preferred equity interests   0 0
Fair Value Measurements [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets held and used 0 0 0
Preferred equity interests   0 0
Fair Value Measurements [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets held and used $ 10,000 11,500 5,000
Preferred equity interests   $ 94,200 $ 108,500