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Derivative Financial Instruments - (Location and Amounts of Derivative Fair Values) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Derivatives and Hedging Activities Designated as Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	$ 3,788	$ 910
Derivatives and Hedging Activities Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	160	241
Foreign currency forward contracts | Derivatives and Hedging Activities Designated as Cash Flow Hedges | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	59	8
Foreign currency forward contracts | Derivatives and Hedging Activities Not Designated as Hedging Instruments | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	160	241
Lead forward contracts | Derivatives and Hedging Activities Designated as Cash Flow Hedges | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	3,729	902
Lead forward contracts | Derivatives and Hedging Activities Not Designated as Hedging Instruments | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	$ 0	$ 0

X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

+ Details

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X

- 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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