XML 43 R31.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Nature of Operations - Additional Information (Detail) | 9 Months Ended
--- | ---
Sep. 30, 2016 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Number of reportable segments | 4

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration