Stock-Based Compensation (Schedule Of Restricted Stock Rights Activity, Excluding Performance-Based Activity) (Details) (Restricted Stock Rights [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2012
Restricted Stock Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Beginning balance		16,323
Granted		8,684
Vested		(5,751)
Forfeited or cancelled		(1,655)
Ending balance	17,601	17,601
Weighted-average grant date fair value, beginning balance		$ 20.73
Weighted-average grant date fair values of restricted stock rights granted	$ 13.80	$ 12.62
Weighted-average grant date fair value, vested during period		$ 20.88
Weighted-average grant date fair value, forfeited or cancelled during period		$ 18.91
Weighted-average grant date fair value, ending balance	$ 16.85	$ 16.85