Commitments and Contingencies - Additional of Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($)	Dec. 31, 2019
Construction Commitments [member]
Disclosure of Commitments and Contingencies [Line Items]
Contractual Obligation	$ 25,600,000
Reimbursement of Contractual Obligation	$ 22,500,000
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