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Long-term Debt - Long-term Debt (Parenthetical) (Detail)	Dec. 31, 2016	Dec. 31, 2015
10 % Senior Secured Toggle Notes due 2020
Debt Instrument [Line Items]
Interest rate on debt instrument	10.00%	10.00%
7 3/4% Senior Notes due 2019
Debt Instrument [Line Items]
Interest rate on debt instrument	7.75%	7.75%
7 3/4% Convertible Second Lien PIK Notes due 2019
Debt Instrument [Line Items]
Interest rate on debt instrument	7.75%	7.75%
9 1/2% Senior Notes due 2020
Debt Instrument [Line Items]
Interest rate on debt instrument	9.50%	9.50%
9½ % Convertible Second Lien PIK Notes due 2020
Debt Instrument [Line Items]
Interest rate on debt instrument	9.50%	9.50%
10 % Senior Secured Notes due 2020
Debt Instrument [Line Items]
Interest rate on debt instrument	10.00%	10.00%

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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+ References

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