Fair Value Measurements - Carrying Amounts and Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value Measurements [Line Items]
Long-term debt	$ 1,061,300	$ 1,060,474
Senior \| 2020 Senior Notes
Fair Value Measurements [Line Items]
Long-term debt	444,775	444,470
Senior \| 2020 Senior Notes \| Level 2 \| Carrying Amount
Fair Value Measurements [Line Items]
Long-term debt	444,775	444,470
Senior \| 2020 Senior Notes \| Level 2 \| Fair Value
Fair Value Measurements [Line Items]
Long-term debt	396,675	477,675
Senior \| 2019 Senior Notes
Fair Value Measurements [Line Items]
Long-term debt	395,538	395,237
Senior \| 2019 Senior Notes \| Level 2 \| Carrying Amount
Fair Value Measurements [Line Items]
Long-term debt	395,538	395,237
Senior \| 2019 Senior Notes \| Level 2 \| Fair Value
Fair Value Measurements [Line Items]
Long-term debt	355,668	425,984
Senior \| 2012 Senior Notes \| Level 2 \| Carrying Amount
Fair Value Measurements [Line Items]
Long-term debt	216,571	216,351
Senior \| 2012 Senior Notes \| Level 2 \| Fair Value
Fair Value Measurements [Line Items]
Long-term debt	$ 216,571	$ 221,702

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant