Pre-Bankruptcy Long-Term Debt (Parenthetical) (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
2017 Term Loan
Debt Instrument [Line Items]
Issuance of senior notes	$ 500,000,000
Discount on senior secured notes	0	$ 4,406,000
2019 Term Loan
Debt Instrument [Line Items]
Issuance of senior notes	350,000,000
Discount on senior secured notes	$ 0	$ 3,668,000

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant