New Accounting Pronouncements - Additional Information (Detail) $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($)
ASU 2016-15 \| Reclassified from Operating Activities to Financing Activities \| June 2017 Amendment of Senior Secured Credit Facility
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash paid	$ 246

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration