Summary of Significant Accounting Principles (Details) (AWP)	Jun. 30, 2012
AWP
Principles of Consolidation
Percentage of ownership interest held by non-controlling owners	50.00%

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

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