Subsequent Event (Details)	Apr. 27, 2016
Subsequent Event
Subsequent Event [Line Items]
Stock dividend, number of shares of Class C capital stock each shareholder of Class A and Class B common stock will receive for every share they hold	2

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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