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Debt (Debt Repurchases) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Sep. 25, 2014 | Mar. 19, 2013
Debt Instrument [Line Items] |  |  |  |
Gain (loss) on extinguishment of debt | $ 5,319,000 | $ (4,795,000) |  |
Amended Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | $ 100,000,000.0 |  |  |
Senior Notes and Term Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, repurchased face amount | On February 11, 2021, the Company’s Board of Directors authorized a new repurchase program for repurchases/retirements of the above referenced Senior Notes and term loan, subject to certain limitations up to an aggregate maximum of $100.0 million through December 2022. |  |  |
Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Gain (loss) on extinguishment of debt | $ 5,300,000 |  |  |
Senior Notes | 6.00% Senior Notes due 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 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 | $ 7,500,000 |  |  |
Percentage of principal amount redeemed | 77.28% |  |  |
Repurchase amount | $ 5,800,000 |  |  |
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 | $ 18,200,000 |  |  |
Percentage of principal amount redeemed | 78.99% |  |  |
Repurchase amount | $ 14,300,000 |  |  |
Senior Notes | 5.875% Senior Notes due 2022 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 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 |  | $ 900,000 |  |

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