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Fair Value Measurements - Estimated fair values and the carrying values (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Fair Value Measurements    
Carrying Value $ 407,349 $ 406,708
2026 Convertible Senior Notes    
Fair Value Measurements    
Carrying Value 393,236 392,621
Fair Value 303,534 290,132
2025 Convertible Senior Notes    
Fair Value Measurements    
Carrying Value 14,113 14,087
Fair Value $ 12,820 $ 12,373