Debt - Summary of Senior Unsecured Notes Redemption Prices (Detail) (12% Senior Unsecured PIK Notes Due 2018 [Member])	9 Months Ended
Sep. 30, 2014
Year 1 [Member]
Debt Instrument, Redemption [Line Items]
Senior unsecured notes redemption price, percentage	106.00%
Year 2 [Member]
Debt Instrument, Redemption [Line Items]
Senior unsecured notes redemption price, percentage	103.00%
Year 3 and thereafter [Member]
Debt Instrument, Redemption [Line Items]
Senior unsecured notes redemption price, percentage	100.00%

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph e

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration