Impairment Charges and Reserves - Impairment Charges and Reserves Measured at Fair Value on Non-Recurring Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held and used, Total Impairment Charges	$ 600	$ 5,800	$ 58,200
Preferred equity interests, Total Impairment Charges	15,544	11,422	61,000
Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets held and used, Fair Value Measurements	5,000	51,500	307,100
Assets included in the spin-off of RVI, Fair Value Measurements		1,028,000	1,249,000
Preferred equity interests, Fair Value Measurements	108,500	185,500	272,000
Long-lived assets held and used, Total Impairment Charges	3,400	6,700	73,300
Assets included in the spin-off of RVI, Total Impairment Charges		62,600	267,200
Preferred equity interests, Total Impairment Charges	15,500	11,400	61,000
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, Fair Value Measurements	0	0	0
Assets included in the spin-off of RVI, Fair Value Measurements		0	0
Preferred equity interests, Fair Value Measurements	0	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, Fair Value Measurements	0	0	0
Assets included in the spin-off of RVI, Fair Value Measurements		0	0
Preferred equity interests, Fair Value Measurements	0	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, Fair Value Measurements	5,000	51,500	307,100
Assets included in the spin-off of RVI, Fair Value Measurements		1,028,000	1,249,000
Preferred equity interests, Fair Value Measurements	$ 108,500	$ 185,500	$ 272,000