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v3.20.2

Indebtedness - New Senior Notes - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019
9.25% Senior Notes Due 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aggregate principal amount | $ 550.0 |  |  |
Interest rate on notes | 9.25% | 9.25% |  |
Debt instrument maturity year | 2026 |  |  |
Net proceeds after underwriting expenses | $ 541.6 |  |  |
Net proceeds after commissions | $ 8.4 |  |  |
Maximum redemption price of notes as percentage of principal amount |  | 100.00% |  |
5.75% Senior Notes Due 2021 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate on notes | 5.75% | 5.75% |  | 5.75%
Repayments of senior notes | $ 324.1 |  |  |
5.875% Senior Notes Due 2022 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate on notes | 5.875% | 5.875% | 5.875% | 5.875%
Repayments of senior notes | $ 175.9 |  |  |

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