XML 80 R67.htm IDEA: XBRL DOCUMENT v3.21.1
Fair Value of Financial Instruments - Fair Value Disclosures (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and Cash Equivalents $ 29,610 $ 15,617 $ 31,833
Long-Term Debt (Excluding Debt Issuance Costs) 2,368,260 2,424,001  
Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and Cash Equivalents 29,610 15,617  
Long-Term Debt (Excluding Debt Issuance Costs) 2,394,177 2,450,853  
Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and Cash Equivalents 29,610 15,617  
Long-Term Debt (Excluding Debt Issuance Costs) $ 2,671,992 $ 2,638,251