Segment Information - Additional Information (Detail) (Maximum)	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Maximum
Revenue, Major Customer [Line Items]
Percentage of other international revenues generated from Brazil and Canada	5.00%	5.00%	5.00%
Maximum percentage of revenue from single customer	10.00%

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

No definition available.

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration