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FRESH-START ACCOUNTING-Liabilities subject to compromise (Details) - USD ($) $ in Thousands		1 Months Ended
	Sep. 09, 2016	Sep. 30, 2016
Liabilities subject to compromise
Fair value of equity and warrants issued to Third Lien Noteholders, Unsecured Noteholders and Convertible Noteholder	$ 554,432
Reorganization Adjustments
Fresh-Start Adjustment
Payments for amended certain office lease arrangements		$ 3,400
Restructuring Advisor fees		$ 10,300
Liabilities subject to compromise
Accrued interest	46,715
Office lease modification and rejection fees	3,427
Liabilities subject to compromise, Total	2,007,703
Fair value of equity and warrants issued to Third Lien Noteholders, Unsecured Noteholders and Convertible Noteholder	(548,947)
Cash payments to Third Lien Noteholders, Unsecured Noteholders and Convertible Noteholder	(86,421)
Office lease modification and rejection fees	(3,427)
Gain on settlement of Liabilities subject to compromise	1,368,908
Reorganization Adjustments | 13.0% senior secured third lien notes due 2022
Liabilities subject to compromise
Debt	1,017,970
Cash payments to Third Lien Noteholders, Unsecured Noteholders and Convertible Noteholder	33,826
Reorganization Adjustments | 9.25% senior notes due 2022
Liabilities subject to compromise
Debt	37,194
Reorganization Adjustments | 8.875% senior notes due 2021
Liabilities subject to compromise
Debt	297,193
Reorganization Adjustments | 9.75% senior notes due 2020
Liabilities subject to compromise
Debt	315,535
Reorganization Adjustments | 8.0% convertible note due 2017
Liabilities subject to compromise
Debt	289,669
Cash payments to Third Lien Noteholders, Unsecured Noteholders and Convertible Noteholder	$ 15,000

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