Derivative Instruments And Hedging Activities (Effect On Earnings And Equity Statements) (Details) (Interest Rate Swap [Member], Fair Value Hedging [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of variable interest rate swaps	$ (2,500)
Change in carrying value of 2013 Notes	(2,500)
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of variable interest rate swaps	(2,490)	(3,009)
Change in carrying value of 2013 Notes	2,496	3,034
Amount of gain (loss) recognized in pre-tax income	$ 6	$ 25