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Fair Value of Financial Instruments (Tables)
12 Months Ended
Mar. 31, 2021
Fair Value Disclosures [Abstract]  
Financial Assets And (Liabilities), Measured At Fair Value On A Recurring Basis
The following tables represent the financial assets and (liabilities) measured at fair value on a recurring basis as of March 31, 2021 and March 31, 2020 and the basis for that measurement:
Total Fair Value Measurement March 31, 2021Quoted Price in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Lead forward contracts$(1,980)$— $(1,980)$— 
Foreign currency forward contracts424 — 424 — 
Total derivatives$(1,556)$— $(1,556)$— 
 
Total Fair Value Measurement March 31, 2020Quoted Price in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Lead forward contracts$(2,433)$— $(2,433)$— 
Foreign currency forward contracts— — 
Total derivatives$(2,432)$— $(2,432)$— 
Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments
The carrying amounts and estimated fair values of the Company’s derivatives and Senior Notes at March 31, 2021 and 2020 were as follows:

 March 31, 2021March 31, 2020
 Carrying
Amount
Fair ValueCarrying
Amount
Fair Value
Financial assets:
Derivatives(1)
$— $— $— $— 
Financial liabilities:
Senior Notes (2)
$600,000 $621,000 $600,000 $573,000 
Derivatives(1)
1,556 1,556 2,432 2,432 
(1)Represents lead and foreign currency forward contracts (see Note 13 for asset and liability positions of the lead and foreign currency forward contracts at March 31, 2021 and March 31, 2020).
(2)The fair value amount of the Senior Notes at March 31, 2021 and March 31, 2020 represent the trading value of the instruments.