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Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Sep. 30, 2012
Oct. 02, 2011
Mar. 31, 2012
Derivatives, Fair Value [Line Items]          
Foreign currency forward contracts $ 45,753   $ 45,753   $ 42,121
Foreign currency contract, maturity     1 year    
Interest rate swap agreements converted into fixed rate basis 85,000   85,000   85,000
Recorded expense in the consolidated condensed statements of income 1,794 33 544 (1,194)  
Not Designated as Hedging Instrument
         
Derivatives, Fair Value [Line Items]          
Change in fair value recorded in other (income) expense, net 77 171 92 881  
Cost of Sales
         
Derivatives, Fair Value [Line Items]          
Derivative gain (loss) to be recorded in income within 12 months, before tax     6,996    
Lead hedge forward contracts
         
Derivatives, Fair Value [Line Items]          
Notional amount in pounds 46,800,000   46,800,000   60,000,000
Hedge forward contracts, maturity 1 year   1 year    
Interest rate swap agreements | Minimum
         
Derivatives, Fair Value [Line Items]          
Derivative, maturity date Feb. 01, 2013   Feb. 01, 2013    
Interest rate swap agreements | Maximum
         
Derivatives, Fair Value [Line Items]          
Derivative, maturity date May 01, 2013   May 01, 2013    
Foreign currency forward contracts
         
Derivatives, Fair Value [Line Items]          
Notional amount 44,610   44,610   11,410
Recorded expense in the consolidated condensed statements of income $ 304 $ 1,407 $ 418 $ 1,487