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Fair Value of Financial Instruments - Fair Value Disclosures (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and Cash Equivalents $ 8,570 $ 3,565 $ 29,610
Long-Term Debt (Excluding Debt Issuance Costs)* 2,226,873 2,214,121  
Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and Cash Equivalents 8,570 3,565  
Long-Term Debt (Excluding Debt Issuance Costs)* 2,243,687 2,231,517  
Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and Cash Equivalents 8,570 3,565  
Long-Term Debt (Excluding Debt Issuance Costs)* $ 2,518,628 $ 2,483,019