Bankruptcy Proceedings, Emergence and Fresh Start Accounting Fresh Start Accounting (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 12, 2016
Fresh-Start Adjustment [Line Items]
Fresh-Start Adjustment, Increase (Decrease), Retained Earnings (Deficit)		$ 2,224,135
Fresh-Start Adjustment, Increase (Decrease), Stockholders' Equity		28,319
Fresh-Start Adjustment, Increase (Decrease), Liabilities and Stockholders' Equity		(55,751)
Reorganization Value		333,974
Fresh-Start Adjustment, Enterprise Value	$ 266,200	234,831
Restatement Adjustment [Member]
Fresh-Start Adjustment [Line Items]
Fresh-Start Adjustment, Increase (Decrease), Retained Earnings (Deficit)		2,224,135
Fresh-Start Adjustment, Increase (Decrease), Receivables, Net		4,292
Fresh-Start Adjustment, Increase (Decrease), Cash and Cash Equivalents		(17,304)
Fresh-Start Adjustment, Increase (Decrease), Current Liabilities		(134,819)
Fresh-Start Adjustment, Increase (Decrease), Current Maturities of Long-term Debt		(113,653)
Fresh-Start Adjustment, Increase (Decrease), Accumulated Other Comprehensive Income (Loss)		(383)
Fresh-Start Adjustment, Increase (Decrease), Stockholders' Equity		1,198,407
Fresh-Start Adjustment, Increase (Decrease), Property and Equipment, Net		0
Fresh-Start Adjustment, Increase (Decrease), Preferred Stock		(1,880)
Fresh-Start Adjustment, Increase (Decrease), Other Current Liabilities		(832)
Fresh-Start Adjustment, Increase (Decrease) Other Deferred Compensation		(3,440)
Fresh-Start Adjustment, Increase (Decrease), Long-term Debt		75,350
Fresh-Start Adjustment, Increase (Decrease), Liabilities Subject to Compromise		(1,154,163)
Fresh-Start Adjustment, Increase (Decrease), Liabilities and Stockholders' Equity		(15,125)
Fresh-Start Adjustment, Increase (Decrease), Deferred Income Tax Assets, Noncurrent		100
Fresh-Start Adjustment, Increase (Decrease), Current Assets		(13,844)
Fresh-Start Adjustment, Increase (Decrease), Assets		(15,125)
Fresh-Start Adjustments, Increase (Decrease), Accounts Payable and Accrued Liabilities		(21,166)
Fresh-Start Adjustment, Increase (Decrease) Treasury Stock		3,574
Fresh-Start Adjustment, Increase (Decrease), Other Assets, Noncurrent		(1,281)
Minimum
Fresh-Start Adjustment [Line Items]
Fresh-Start Adjustment, Enterprise Value	218,000
Maximum
Fresh-Start Adjustment [Line Items]
Fresh-Start Adjustment, Enterprise Value	382,000
Weighted Average [Member]
Fresh-Start Adjustment [Line Items]
Fresh-Start Adjustment, Enterprise Value	$ 300,000
Successor [Member]
Fresh-Start Adjustment [Line Items]
Fresh-Start Adjustment, Increase (Decrease), Additional Paid-in Capital		190,745
Fresh-Start Adjustment, Increase (Decrease), Common Stock		$ 150

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Fresh-Start Adjustment, Increase (Decrease) Treasury Stock

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Fresh-Start Adjustments, Increase (Decrease), Accounts Payable and Accrued Liabilities

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Amount of fresh-start adjustment to accumulated other comprehensive Income or Loss.

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Amount of fresh-start adjustment to additional paid-in capital.

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Total fresh-start adjustment to assets.

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Amount of fresh-start adjustment to common stock.

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Total fresh-start adjustment to current assets.

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Amount of fresh-start adjustment to current maturities of long-term debt.

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Amount of fresh-start adjustment to noncurrent deferred income tax assets.

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Total fresh-start adjustment to liabilities and stockholders' equity.

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Amount of fresh-start adjustment to liabilities subject to compromise.

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Amount of fresh-start adjustment to preferred stock.

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Total fresh-start adjustment to property and equipment, net.

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Total fresh-start adjustment to stockholders' equity.

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Amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

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