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Debt - Chapter 11 Proceedings (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Oct. 04, 2016 | Dec. 31, 2015
Debt Instrument |  |  |  |  |
Proceeds from borrowings |  | $ 489,198,000 | $ 2,190,000,000 |  |
Debt issued | $ 0 | 0 |  |  | $ 3,562,378,000
Unamortized debt issuance costs and associated discounts and premiums written-off |  | 158,600,000 |  |  |
Debt holder conversion feature and mandatory prepayment feature - PGC Senior Secured Notes | 0 | 9,777,000 |  |  |
Unamortized discount (premium) and debt issuance costs, net |  |  |  |  | 342,600,000
Fair value of debt derivative |  |  |  |  | $ 32,300,000
Convertible Senior Unsecured Notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Debt reclassified to liabilities subject to compromise | 87,600,000 | 87,600,000 |  |  |
Secured Notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Debt reclassified to liabilities subject to compromise | 1,300,000,000 | 1,300,000,000 |  |  |
Senior Unsecured Notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Debt reclassified to liabilities subject to compromise | 2,200,000,000 | 2,200,000,000 |  |  |
Senior credit facility |  |  |  |  |
Debt Instrument |  |  |  |  |
Debt reclassified to liabilities subject to compromise | $ 449,200,000 | $ 449,200,000 |  |  |
Subsequent Event | Revolving Credit Facility | New Credit Facility |  |  |  |  |
Debt Instrument |  |  |  |  |
Maximum borrowing capacity |  |  |  | $ 425,000,000.0 |
Subsequent Event | Convertible Senior Unsecured Notes | New Convertible Debt |  |  |  |  |
Debt Instrument |  |  |  |  |
Face amount of debt instrument |  |  |  | 281,800,000 |
Subsequent Event | Secured Notes | New Building Note |  |  |  |  |
Debt Instrument |  |  |  |  |
Face amount of debt instrument |  |  |  | $ 35,000,000.0 |

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