Commitments and Contingencies - Additional Information (Detail)	12 Months Ended
Dec. 31, 2015
Commitments and Contingencies [Line Items]
Document Fiscal Year Focus	2015

This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

No definition available.

Name:	dei_DocumentFiscalYearFocus
Namespace Prefix:	dei_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration