Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) (USD $)	3 Months Ended
	Jun. 30, 2012
Share-based Compensation [Abstract]
Beg balance, Options outstanding	1,677,962
Options exercised	(14,320)
Options canceled	26,800
End balance, Options outstanding	1,636,842
Beg balance, options outstanding weighted average exercise price	$ 26.49
Exercised, weighted average exercise price	$ 17.39
Canceled, weighted average exercise price	$ 25.25
End balance, options outstanding weighted average exercise price	$ 26.59
Beg Balance, available for grant	677,429
Options cancelled	26,800
End Balance, available for grant	704,229