Components of Interest Expense (Detail) - USD ($)	1 Months Ended	2 Months Ended		3 Months Ended	8 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 12, 2016		Sep. 30, 2015	Sep. 12, 2016		Sep. 30, 2016	Sep. 30, 2015
Contractual Interest Expense [Line Items]
Contractual Interest Expense on Prepetition Liabilities Not Recognized in Statement of Operations		$ 19,300,000			$ 66,100,000
Debtor Reorganization Items, Write-off of Debt Issuance Costs and Debt Discounts							$ 20,500,000
Interest on borrowings and related fees 1	$ 180,000	1,363,000	[1]	$ 23,239,000	36,013,000	[2]		$ 69,371,000
Amortization of debt issuance costs	38,000	0		1,224,000	22,188,000	[3]		3,504,000
Capitalized interest	0	0		(1,478,000)	(183,000)			(4,854,000)
Interest expense	$ 218,000.00	1,363,000		$ 22,985,000	58,018,000			$ 68,021,000
7.25% Senior Notes due 2019
Contractual Interest Expense [Line Items]
Contractual Interest Expense on Prepetition Liabilities Not Recognized in Statement of Operations		4,400,000			$ 15,300,000
Senior Notes Due 2020 [Member]
Contractual Interest Expense [Line Items]
Contractual Interest Expense on Prepetition Liabilities Not Recognized in Statement of Operations		$ 13,400,000					$ 46,300,000

[1] Preferred stock dividends were excluded from the computation of diluted earnings (loss) per share for the period January 1, 2016 through September 12, 2016 and the nine months ended September 30, 2015, as the assumed conversion of the outstanding preferred stock would have been anti-dilutive.

[2] Absent the bankruptcy proceedings and the corresponding suspension of the accrual of interest on unsecured debt, we would have recorded total contractual interest expense of $66.1 million for the period from January 1, 2016 through September 12, 2016, including $15.3 million attributable to the 2019 Senior Notes and $46.3 million attributable to the 2020 Senior Notes.

[3] Includes $20.5 million related to the accelerated write-off of unamortized debt issuance costs associated with the RBL and Senior Notes (see Note 8).