Derivative Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value Of Derivative Instruments In The Consolidated Balance Sheets

Presented below in tabular form is information on the location and amounts of derivative fair values in the Consolidated Balance Sheets and derivative gains and losses in the Consolidated Statements of Income:

Fair Value of Derivative Instruments

March 31, 2018 and 2017

	Derivatives and Hedging Activities Designated as Cash Flow Hedges				Derivatives and Hedging Activities Not Designated as Hedging Instruments
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Prepaid and other current assets
Lead forward contracts	$	—	$	1,163	$	—	$	—
Foreign currency forward contracts	209		11		—		—
Total assets	$	209	$	1,174	$	—	$	—
Accrued expenses
Lead forward contracts	$	3,877	$	—	$	—	$	—
Foreign currency forward contracts	—		—		187		324
Total liabilities	$	3,877	$	—	$	187	$	324

The Effect of Derivative Instruments on the Consolidated Statements of Income

The Effect of Derivative Instruments on the Consolidated Statements of Income

For the fiscal year ended March 31, 2018

Derivatives Designated as Cash Flow Hedges	Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)			Location of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts	$	(805	)	Cost of goods sold	$	5,860
Foreign currency forward contracts	(3,524		)	Cost of goods sold	(2,718		)
Total	$	(4,329	)		$	3,142

The Effect of Derivative Instruments on the Consolidated Statements of Income

For the fiscal year ended March 31, 2016

Derivatives Designated as Cash Flow Hedges	Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)			Location of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts	$	(3,361	)	Cost of goods sold	$	(11,085	)
Foreign currency forward contracts	(3,023		)	Cost of goods sold	3,941
Total	$	(6,384	)		$	(7,144	)

The Effect of Derivative Instruments on the Consolidated Statements of Income

For the fiscal year ended March 31, 2017

Derivatives Designated as Cash Flow Hedges	Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		Location of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts	$	7,907	Cost of goods sold	$	5,803
Foreign currency forward contracts	845		Cost of goods sold	433
Total	$	8,752		$	6,236

Effect Of Derivative Instruments

Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized in Income on Derivative	Pretax Gain (Loss)
Foreign currency forward contracts	Other (income) expense, net	$	(471	)
Total		$	(471	)

Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized in Income on Derivative	Pretax Gain (Loss)
Foreign currency forward contracts	Other (income) expense, net	$	(409	)
Total		$	(409	)

Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized in Income on Derivative	Pretax Gain (Loss)
Foreign currency forward contracts	Other (income) expense, net	$	180
Total		$	180