Subsequent Events (Details) - Subsequent Event [Member]	May 10, 2018 $ / shares shares
Subsequent Event [Line Items]
Shares issued to defined benefit plan (in shares) \| shares	8,769
Share price of shares issued (in dollars per share) \| $ / shares	$ 635

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