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Derivatives And Hedging Activities (Effect Of Derivative Financial Instruments On The Consolidated Balance Sheets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 31, 2017
Derivative [Line Items]    
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments $ 8,281 $ 2,205
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments 123 55
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments 341 917
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments 269 120
Forward Foreign Currency Exchange Contracts [Member] | Other Current Assets [Member]    
Derivative [Line Items]    
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments 19 56
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments 341 917
Forward Foreign Currency Exchange Contracts [Member] | Accounts Payable And Accrued Expenses [Member]    
Derivative [Line Items]    
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments 123 55
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments 269 120
Cash Flow Hedges [Member] | Interest Rate Swap Agreements [Member] | Other Non-Current Assets [Member]    
Derivative [Line Items]    
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments 8,262 2,149
Cash Flow Hedges [Member] | Interest Rate Swap Agreements [Member] | Other Noncurrent Liabilities [Member]    
Derivative [Line Items]    
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments $ 0 $ 0