Commitments and Contingencies (Details)	Mar. 30, 2017 lawsuit
Punitive Lawsuits Filed in the United States District Court for the Southern District of Texas
Loss Contingencies [Line Items]
Number of lawsuits dismissed (lawsuit)	4

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