Acquisition - Business Acquisition Consideration Transferred (Parenthetical) (Detail)	Apr. 01, 2013
Business Combinations [Abstract]
Percentage of previously acquired investment	30.00%

Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

No definition available.

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