The Company - Additional Information (Details)	Dec. 31, 2017 country
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of countries in which company operates (more than)	100

The number of countries in which the entity operates as of balance sheet date.

No definition available.

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant