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Financial Instruments - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Gross long-term debt	$ 375,397,000	$ 443,035,000
Unrealized gain (loss) on derivatives	(6,548,000)	(273,000)
Interest Rate Swap
Derivative [Line Items]
Unrealized gain (loss) on derivatives	6,821,000
Secured Debt | Interest Rate Swap
Derivative [Line Items]
Derivative notional amount	350,000,000
Term Loan Facility | Secured Debt
Derivative [Line Items]
Gross long-term debt	$ 355,000,000	$ 400,000,000

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Nominal or face amount used to calculate payment on derivative.

+ References

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+ References

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