Basis of Presentation (Details) (Cerro Bayo Mine [Member])	Aug. 09, 2010
Cerro Bayo Mine [Member]
Basis of Presentation (Textual) [Abstract]
Percentage of sale in the Cerro Bayo mine	100.00%

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant