Financial Instruments - Carrying Amounts and Estimated Fair Values of Notes (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
2023 notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net Carrying Amount	$ 23,355	$ 23,280
Estimated Fair Value	21,264	34,487
2025 notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net Carrying Amount	652,164	650,783
Estimated Fair Value	386,534	593,366
2027 notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net Carrying Amount	564,354	563,234
Estimated Fair Value	$ 268,962	$ 467,814