Fair Value Measurements - Narrative (Detail)	3 Months Ended			9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charge on operating lease right-of-use assets	$ 0	$ 1,300,000		$ 0	$ 7,500,000
Fair value of impaired operating lease right-of-use assets		$ 500,000	$ 14,600,000		500,000
Management fees and a market supported lease coverage ratio		110.00%	110.00%
Non-cash impairment charge on property and equipment	$ 0	$ 1,900,000	$ 29,800,000	$ 0	31,700,000
Fair value of impaired property and equipment		$ 12,500,000	$ 10,500,000		$ 12,500,000
Discount Rate | Minimum | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of discount rates utilized		0.077	0.077		0.077
Discount Rate | Maximum | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of discount rates utilized		0.103	0.103		0.103