Commitments and Contingencies - Additional of Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2021 USD ($) Lawsuit	Dec. 31, 2020 Lawsuit
Construction Commitments [member]
Disclosure of Commitments and Contingencies [Line Items]
Contractual obligation | $	$ 51,404,000
Pending Litigation [member]
Disclosure of Commitments and Contingencies [Line Items]
Loss contingency, number of plaintiffs	0	0
Threatened Litigation [member]
Disclosure of Commitments and Contingencies [Line Items]
Loss contingency, number of plaintiffs	0	0