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v3.19.3.a.u2

Debt (5.875% Senior Notes) (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Apr. 18, 2016 | Oct. 03, 2013
5.875% Senior Notes | 2020 and thereafter |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |
Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.125% |  |  |
Senior Notes | 6.625% Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 6.625% | 6.625% |  |
Senior Notes | 6.00% Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, face amount |  |  | $ 350,000,000.0 |
Stated interest rate | 6.00% |  |  |
Percentage of principal amount redeemable | 101.00% |  |  |
Senior Notes | 6.00% Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notice period prior to redemption | 60 days |  |  |
Senior Notes | 6.00% Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notice period prior to redemption | 30 days |  |  |
Senior Notes | 5.875% Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, face amount |  |  |  | $ 250,000,000.0
Stated interest rate | 5.875% | 5.875% |  |
Percentage of principal amount redeemable | 101.00% |  |  |
Debt covenant, asset proceeds, excess proceeds | $ 25,000,000.0 |  |  |
Debt covenant, indenture agreement, period after notice | 60 days |  |  |
Senior Notes | 5.875% Senior Notes | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notice period prior to redemption | 60 years |  |  |
Senior Notes | 5.875% Senior Notes | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notice period prior to redemption | 30 years |  |  |

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