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

Amount, after accumulated amortization, of debt discount.

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=64930785&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=64930739&loc=d3e28878-108400

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