Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions	3 Months Ended
Sep. 30, 2011	Jun. 30, 2011
Available for use credit line	$ 50.0
Customer Remediation Period Expense		66.3
Customer Remediation Accrual	$ 59.0
Date of completion of customer remediation efforts	end of second quarter of 2012.

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant