Stock-Based Compensation (Stock-Based Awards Issued During The Period) (Details) (USD $)	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number granted	79,950	61,600
Grant date fair value	$ 52.78	$ 60.12
Performance Share Awards (PSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number granted	48,450	52,400
Grant date fair value	$ 46.41	$ 53.56