Derivatives And Hedging Activities (Effect Of Derivative Financial Instruments On The Consolidated Balance Sheets) (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments	$ 12,370	$ 12,593	$ 13,704
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments			5
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments	1,185	1,222	918
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments	103	243	443
Interest Rate Swap Agreements [Member] | Other Non-Current Assets [Member]
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments	11,612	10,193	13,547
Interest Rate Swap Agreements [Member] | Long-Term Obligations [Member]
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments
Forward Foreign Currency Exchange Contracts [Member] | Other Current Assets [Member]
Derivatives in a Fair Value Asset Position Designated as Hedging Instruments	758	2,400	157
Derivatives in a Fair Value Asset Position Not Designated as Hedging Instruments	1,185	1,222	918
Forward Foreign Currency Exchange Contracts [Member] | Accounts Payable and Accrued Expenses [Member]
Derivatives in a Fair Value Liability Position Designated as Hedging Instruments			5
Derivatives in a Fair Value Liability Position Not Designated as Hedging Instruments	$ 103	$ 243	$ 443