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Derivatives And Hedging Activities (Effect Of Derivative Financial Instruments On The Consolidated Balance Sheets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Derivative [Line Items]      
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments $ 5,688 $ 0 $ 1,530
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments 34,861 48,630 16,150
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments 1,625 314 259
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments 324 4,375 1,038
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 0
Interest Rate Swap Agreements [Member] | Other Long-Term Liabilities [Member]      
Derivative [Line Items]      
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments 33,950 37,163 15,978
Forward Foreign Currency Exchange Contract [Member] | Other Current Assets [Member]      
Derivative [Line Items]      
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments 5,688 0 1,530
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments 1,625 314 259
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 911 11,467 172
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments $ 324 $ 4,375 $ 1,038