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Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Condensed Statements of Income (Detail) - Designated as Hedging Instrument - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Derivatives, Fair Value [Line Items] |  |  |
Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | $ (10,980) | $ (4,329) | $ 8,752
Gain (Loss) Reclassified from AOCI (Effective Portion) | (15,281) | 3,142 | 6,236
Lead hedge forward contracts |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | (12,531) | (805) | 7,907
Foreign currency forward contracts |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) | 1,551 | (3,524) | 845
Cost of Sales | Lead hedge forward contracts |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gain (Loss) Reclassified from AOCI (Effective Portion) | (15,666) | 5,860 | 5,803
Cost of Sales | Foreign currency forward contracts |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gain (Loss) Reclassified from AOCI (Effective Portion) | $ 385 | $ (2,718) | $ 433

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109978405&loc=d3e80720-113993 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
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