Financial Instruments - Carrying Amounts and Estimated Fair Values of Notes (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
2023 notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net Carrying Amount	$ 23,318	$ 23,280
Estimated Fair Value	27,559	34,487
2025 notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net Carrying Amount	651,474	650,783
Estimated Fair Value	493,907	593,366
2027 notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net Carrying Amount	563,793	563,234
Estimated Fair Value	$ 389,304	$ 467,814