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Derivative Financial Instruments - Derivatives Effect on Statements of Income (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Designated as Hedging Instrument |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) | $ (3,053) | $ 8,200 | $ (3,196)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | (1,717) | 9,057 | (1,176)
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) | (9,422) | (2,695) | 29,201
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | 4,413 | 713 | 3,587
Derivatives Not Designated as Hedging Instruments |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | 3,136 | (846) | 1,182
Lead forward contracts | Designated as Hedging Instrument | Cost of goods sold |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) | (3,703) | (455) | (3,883)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | (4,880) | 5,388 | (3,765)
Foreign currency forward contracts | Designated as Hedging Instrument | Cost of goods sold |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) | 1,475 | 1,740 | 1,849
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | 1,297 | 612 | 2,589
Foreign currency forward contracts | Derivatives Not Designated as Hedging Instruments | Other (income) expense, net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | 3,136 | (846) | 1,182
Cross currency fixed interest rate swaps | Designated as Hedging Instrument | Interest expense |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) | (9,422) | (2,695) | 29,201
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | 4,413 | 713 | 3,587
Interest rate swaps | Designated as Hedging Instrument | Interest expense |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) | (825) | 6,915 | (1,162)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) | $ 1,866 | $ 3,057 | $ 0

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- Definition Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Subparagraph (c) -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C + Details
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