Long-Term Debt - Schedule of Early Redemption Prices on 6.0% Senior Notes Due 2029 (Details) - 6% Senior Secured Notes due 2029 - Senior Secured Notes	12 Months Ended
Dec. 31, 2020
Debt Instrument, Redemption, Period One
Debt Instrument Redemption [Line Items]
Debt Instrument Redemption Price Percentage	103.00%
Debt Instrument, Redemption Period, Start Date	Jan. 15, 2024
Debt Instrument, Redemption Period, End Date	Jan. 14, 2025
Debt Instrument, Redemption, Period Two
Debt Instrument Redemption [Line Items]
Debt Instrument Redemption Price Percentage	101.50%
Debt Instrument, Redemption Period, Start Date	Jan. 15, 2025
Debt Instrument, Redemption Period, End Date	Jan. 14, 2026
Debt Instrument, Redemption, Period Three
Debt Instrument Redemption [Line Items]
Debt Instrument Redemption Price Percentage	100.00%
Debt Instrument, Redemption Period, Start Date	Jan. 15, 2026
Debt Instrument, Redemption Period, End Date	Jan. 14, 2029

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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End date of debt instrument redemption period, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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Start date of debt instrument redemption period, in CCYY-MM-DD format.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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