Derivative Instruments (Narratives) (Details)	12 Months Ended
	Mar. 31, 2020 USD ($) Counterparty	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Derivatives, Fair Value [Line Items]
Number of different counterparties | Counterparty	3
Reclassify Next Year
Derivatives, Fair Value [Line Items]
Amount of accumulated other comprehensive loss expected to be reclassified in the next 12 months	$ 264,000
Derivatives Designated as Hedging Instruments | Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Amount of accumulated other comprehensive loss expected to be reclassified in the next 12 months	1,312,000
Derivative, Notional Amount	181,390,000
Derivatives Designated as Hedging Instruments | Commodity Contract
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	8,422,000
Derivatives Designated as Hedging Instruments | Reclassify Next Year
Derivatives, Fair Value [Line Items]
Amount of accumulated other comprehensive loss expected to be reclassified in the next 12 months	1,066,000
Derivatives Designated as Hedging Instruments | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	158,490,000
Cost of Sales [Member] | Derivatives Designated as Hedging Instruments | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	40,000	$ (16,000)	$ (196,000)
Cost of Sales [Member] | Derivatives Designated as Hedging Instruments | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		765,000
Foreign Currency Gain (Loss) [Member] | Derivatives Designated as Hedging Instruments | Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		$ (17,231,000)	25,206,000
Interest Expense [Member] | Derivatives Designated as Hedging Instruments | Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	2,888,000
Interest Expense [Member] | Derivatives Designated as Hedging Instruments | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 242,000
Interest Expense [Member] | Derivatives Designated as Hedging Instruments | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net			$ (1,879,000)