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Fair Value Measurements - Estimated fair values and the carrying values (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value $ 405,436 $ 404,171
Senior Notes 2026    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value 391,399 390,523
Fair Value 274,781 331,783
Senior Notes 2025    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying Value 14,037 13,648
Fair Value $ 11,961 $ 13,628