Supplemental Disclosures of Cash Flow Information - Amounts Related to Debt Refinancing (Detail) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($)
Supplemental Cash Flow Elements [Abstract]
Non-cash write-off of deferred loan fees and original issue discount related to debt extinguishments	$ 12,084
Prepayment premium on term loans	(2,518)
Original issue discount - retirement of term loans	(14,230)
Amounts related to debt refinancing	$ (4,664)

Amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1927-112601

Name:	us-gaap_ShortTermDebtRefinancedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration