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Schedule Of Unrecognized Tax Benefits Which Would Lower The Effective Tax Rate If Realized (Detail) (State and Local Jurisdiction, USD $)
In Thousands, unless otherwise specified
6 Months Ended
Sep. 30, 2012
State and Local Jurisdiction
 
Income Tax Contingency [Line Items]  
Unrecognized tax benefit related to state tax issues $ 8,736
Interest receivable on unrecognized tax benefit related to state tax issues $ 64