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Derivatives And Hedging Activities (Effect Of Derivative Financial Instruments On The Consolidated Balance Sheets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Derivative [Line Items]      
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments $ 1,530 $ 307 $ 6,667
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments 16,150 6,351 0
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments 259 233 103
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments 1,038 386 34
Interest Rate Swap Agreements [Member] | Other Non-Current Assets [Member]      
Derivative [Line Items]      
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments 0 0 6,075
Interest Rate Swap Agreements [Member] | Other Long-Term Liabilities [Member]      
Derivative [Line Items]      
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments 15,978 6,351 0
Forward Foreign Currency Exchange Contract [Member] | Other Current Assets [Member]      
Derivative [Line Items]      
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments 1,530 307 592
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments 259 233 103
Forward Foreign Currency Exchange Contract [Member] | Accounts Payable and Accrued Expenses [Member]      
Derivative [Line Items]      
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments 172 0 0
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments $ 1,038 $ 386 $ 34