Stock-Based Compensation (Stock Option Grant Assumptions) (Details) (Stock Option [Member])	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Stock Option [Member]
Valuation Assumption [Line Items]
Expected volatility	40.50%	40.10%	41.10%
Expected dividend yield	1.95%	1.83%	1.73%
Expected term, average years	5 years 7 months	5 years 8 months	5 years 8 months
Risk-free interest rate	1.00%	0.90%	1.90%