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v3.20.2

Debt (Debt Repurchases) (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 12, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  | $ 1,472,000 | $ 594,000 | $ 3,035,000 | $ (5,147,000) |
5.125% Senior Notes due 2023 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 5.125% |  | 5.125% |  |
5.875% Senior Notes due 2022 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 5.875% |  | 5.875% |  |
Amended Credit Agreement |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  | $ 100,000.0 |  | $ 100,000.0 |  |
Gain (loss) on extinguishment of debt | $ (1,200,000) |  |  |  |  |
6.00% Senior Notes due 2026 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 6.00% |  | 6.00% |  |
5.875% Senior Notes due 2024 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 5.875% |  | 5.875% |  |
Senior Notes | 5.125% Senior Notes due 2023 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 5.125% |  | 5.125% |  | 5.125%
Debt instrument, repurchased face amount |  | $ 11,000,000.0 |  | $ 11,000,000.0 |  |
Percentage of principal amount redeemed |  |  |  | 75.66% |  |
Repurchase amount |  | $ 8,300,000 |  | $ 8,300,000 |  |
Gain (loss) on extinguishment of debt |  |  |  | $ 3,000,000.0 |  |
Senior Notes | 5.875% Senior Notes due 2022 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 5.875% |  | 5.875% |  | 5.875%
Debt instrument, repurchased face amount |  |  |  |  |  | $ 56,000,000.0
Percentage of principal amount redeemed |  |  |  |  |  | 97.55%
Repurchase amount |  |  |  |  |  | $ 54,700,000
Gain (loss) on extinguishment of debt |  |  |  |  |  | $ (300,000)
Senior Notes | 6.00% Senior Notes due 2026 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 6.00% |  | 6.00% |  | 6.00%
Senior Notes | 5.875% Senior Notes due 2024 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  | 5.875% |  | 5.875% |  | 5.875%
Debt instrument, repurchased face amount |  | $ 2,000,000.0 |  | $ 2,000,000.0 |  |
Percentage of principal amount redeemed |  | 76.75% |  |  |  |
Repurchase amount |  | $ 1,500,000 |  | $ 1,500,000 |  |

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