Financial Instruments and Fair Value Disclosures - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Letters of credit to guarantee	$ 12,800		$ 12,800
Trade receivables past due	6,400		6,400
Trade receivables reserved for previous years	5,500		5,500
Trade receivables, less than 90 Days past due	900		900
Allowance for credit losses	5,633		5,633	$ 5,459
Loss on impairment of assets		$ 774,000	$ 774,028
Measurement period for determining fair value of debt instruments			10 days
Fair Value Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loss on impairment of assets	$ 0
ASU 2016-13
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimate of credit losses			$ 200