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Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Gross long-term debt $ 462,197 $ 375,397
Unrealized gain (loss) on derivatives 4,586 (6,548)
Interest Rate Swap    
Derivative [Line Items]    
Unrealized gain (loss) on derivatives (2,236)  
Secured Debt | Interest Rate Swap    
Derivative [Line Items]    
Derivative notional amount 275,000  
Term Loan Facility | Secured Debt    
Derivative [Line Items]    
Gross long-term debt $ 446,888 $ 355,000