Financial Instruments - Summary of Outstanding Interest Rate Swaps (Details) - Interest rate swaps - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Other current liability
Derivatives, Fair Value [Line Items]
Notional amount, Liability	$ 10,000,000
Fair value, Liability	(13,000)
Other non-current liabilities
Derivatives, Fair Value [Line Items]
Notional amount, Liability	85,000,000	$ 45,000,000
Fair value, Liability	$ (2,552,000)	(591,000)
Other current assets
Derivatives, Fair Value [Line Items]
Notional amount, Asset		25,000,000
Fair value, Asset		$ 66,000