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Debt - Redemption of Prior Notes Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Feb. 07, 2020 | Jan. 31, 2020 | Dec. 31, 2019
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12.00%/13.00% Senior PIK Toggle Notes due 2022 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aggregate principal amount |  |  | $ 500.0 |
Cash interest rate, stated percentage | 12.00% |  |  | 12.00%
PIK interest rate, stated percentage | 13.00% |  |  | 13.00%
9.250% Notes due 2024 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aggregate principal amount |  |  | $ 750.0 |
Stated interest rate | 9.25% |  | 9.25% |
Principal amount repurchased |  | $ 0.5 |  |
10.00% Notes due 2024 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aggregate principal amount |  |  | $ 120.0 |
Stated interest rate |  |  |  | 10.00%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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