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Derivative Instruments (Narratives) (Details)
12 Months Ended
Mar. 31, 2021
USD ($)
Counterparty
Mar. 31, 2020
USD ($)
Mar. 31, 2019
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 $ 57,000    
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 653,000    
Derivative, Notional Amount 159,520,000    
Derivatives Designated as Hedging Instruments | Commodity Contract      
Derivatives, Fair Value [Line Items]      
Derivative, Notional Amount 6,457,000    
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 901,000    
Derivatives Designated as Hedging Instruments | Interest Rate Swap [Member]      
Derivatives, Fair Value [Line Items]      
Derivative, Notional Amount 119,820,000    
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 83,000 $ 40,000 $ (16,000)
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   242,000  
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   $ (2,888,000) (17,231,000)
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 (7,268,000)    
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 $ (1,463,000)    
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     $ 765,000