Notes Receivable - Additional Information (Detail)	12 Months Ended
Dec. 31, 2016
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing period of distribution rights, years	10 years

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