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Commitments Contingencies and Litigation - Additional Information (Detail)
In Thousands, unless otherwise specified |
12 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2013
USD ($)
Person
|
Mar. 31, 2012
USD ($)
|
Oct. 02, 2011
USD ($)
|
Oct. 02, 2011
EUR (€)
|
Mar. 31, 2009
USD ($)
|
Mar. 31, 2009
EUR (€)
|
Mar. 31, 2013
Lead hedge forward contracts
USD ($)
lb
|
Mar. 31, 2012
Lead hedge forward contracts
USD ($)
lb
|
Mar. 31, 2013
Foreign currency forward contracts
USD ($)
|
Mar. 31, 2012
Foreign currency forward contracts
USD ($)
|
Mar. 31, 2013
Interest rate swap agreements
USD ($)
|
Mar. 31, 2012
Interest rate swap agreements
USD ($)
|
|
| Commitments, Contingencies And Litigation [Line Items] | ||||||||||||
| Litigation damages assessed and paid | $ 4,200 | € 2,700 | ||||||||||
| Refund from damages paid | 900 | 671 | ||||||||||
| Reserves of environmental liabilities | 2,915 | 2,995 | ||||||||||
| Company number of employees | 9,000 | |||||||||||
| Percentage of employees covered by collective bargaining agreements | 35.00% | |||||||||||
| Average term of collective bargaining agreements | 2 years | |||||||||||
| Longest term of collective bargaining agreements | 4 years | |||||||||||
| Percentage of collective bargaining agreements that expire in next twelve months | 33.00% | |||||||||||
| Purchase price of hedges, pounds of lead | 56,300,000 | 60,000,000 | ||||||||||
| Purchase price of hedges | 56,601 | 56,610 | 73,115 | 53,531 | ||||||||
| Convertible interest rate swap | $ 65,000 | $ 85,000 | ||||||||||
| Interest rate swap agreements expiration date | May 01, 2013 | |||||||||||