Derivative Instruments (Details)	3 Months Ended		6 Months Ended
	Sep. 30, 2020 USD ($) counterparty	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) counterparty	Sep. 30, 2019 USD ($)	Mar. 31, 2020 USD ($)
Foreign currency exchange contracts and hedging
Notional value	$ 72,353,000		$ 72,353,000		$ 0
Fair value recorded in other current assets	285,000		285,000
Fair value recorded in other accrued expenses	$ 831,000		$ 831,000
Number of counterparties in derivative contracts | counterparty	4		4
Maturity of foreign currency derivatives			6 months
(Loss) gain recorded in OCI	$ (1,173,000)	$ 2,190,000	$ (709,000)	$ 1,773,000
Reclassifications from AOCL into net sales	121,000	(216,000)	121,000	(216,000)
Income tax benefit (expense) in OCI	252,000	(477,000)	141,000	(377,000)
Unrealized gain (loss) on cash flow hedges, net of tax	(800,000)	1,497,000	(447,000)	1,180,000
Gain recorded in SG&A expenses	42,000	$ 502,000	42,000	$ 146,000
Designated Derivative Contracts
Foreign currency exchange contracts and hedging
Notional value	53,444,000		53,444,000
Fair value recorded in other current assets	243,000		243,000
Fair value recorded in other accrued expenses	831,000		831,000
Non-Designated Derivative Contracts
Foreign currency exchange contracts and hedging
Notional value	18,909,000		18,909,000
Fair value recorded in other current assets	42,000		42,000
Fair value recorded in other accrued expenses	$ 0		$ 0