Financial Instruments - Summary of Outstanding Interest Rate Swaps (Detail) - Interest Rate Swaps [Member] - USD ($)	Sep. 30, 2020	Jun. 26, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 50,000,000	$ 25,000,000
Other Current Liability [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	10,000,000
Fair Value	(37,000)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	85,000,000		$ 45,000,000
Fair Value	$ (2,878,000)		(591,000)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Notional Amount			25,000,000
Fair Value			$ 66,000