Subsequent Event (Details) (Subsequent event, USD $) In Millions, unless otherwise specified	Oct. 31, 2014
Subsequent event
Subsequent Event [Line Items]
Net sale proceeds	$ 2.9

The value of all consideration given or received by the Entity in the significant acquisition or disposal.

No definition available.

Name:	us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant