Earnings Per Share (Details)	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Anti-dilutive securities excluded from the computation of diluted earnings per share	1,800,000	1,300,000	1,800,000	1,400,000
Weighted average basic shares outstanding	74,767,000	73,767,000	74,534,000	73,505,000
Incremental shares from assumed exercises of stock options and options under the ESPP	1,187,000	1,327,000	1,187,000	1,307,000
Weighted average diluted shares outstanding	75,954,000	75,094,000	75,721,000	74,812,000