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Condensed Consolidating Financial Information (Narrative) (Details) - USD ($) $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 06, 2016 | Mar. 28, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |  |
Assets | $ 4,456,654 |  |  |  | $ 4,350,900
Net income | 405,783 | $ 54,103 |  |  |
Net cash from operating activities | 256,906 | 241,449 |  |  |
Parent |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets | 4,608,732 |  |  |  | $ 3,643,330
Subsidiaries, Ownership Percentage |  |  |  | 100.00% |
Net cash from operating activities | $ (87,625) | (38,073) |  |  |
Parent | Senior Notes | 9.00% Senior Notes Due 2020 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 9.00% |  | 9.00%
Parent | Senior Notes | 6.875 % Senior Notes Due 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.875% |  |  |  | 6.875%
Parent | Senior Notes | 6.375% Senior Notes Due 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.375% |  |  |  |
Guarantor Subsidiaries |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets | $ 5,392,472 |  |  |  | $ 5,878,690
Net cash from operating activities | 309,530 | 281,845 |  |  |
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets | 477,592 |  |  |  | 92,402
Net cash from operating activities | 26,251 | (16,309) |  |  |
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Assets | 0 |  |  |  | $ 221
Net cash from operating activities | $ 0 | $ (78) |  |  |

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