Summary of Significant Accounting Policies - Principles of Consolidation (Details)	Apr. 30, 2013	Apr. 04, 2013
Accounting Policies [Abstract]
Ownership percentage by parent	65.00%	65.00%
Noncontrolling interest ownership percentage by noncontrolling owners	35.00%	35.00%

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