Derivatives And Hedging Activities (Effect Of Derivative Financial Instruments On The Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Derivative [Line Items]
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments	$ 0	$ 475	$ 0
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments	11,010	10,766	6,430
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments	140	297	4,354
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments	1,554	5	12
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	11,010	10,766	6,430
Forward Foreign Currency Exchange Contract [Member] | Other Current Assets [Member]
Derivative [Line Items]
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments	0	475	0
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments	140	297	4,354
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	0	0	0
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments	$ 1,554	$ 5	$ 12