Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Anti-dilutive securities excluded from the computation of diluted earnings per share	3,000	2,000	2,700	1,800
Weighted average basic shares outstanding	73,836	74,561	74,540	74,417
Incremental shares from assumed exercises of stock options and options under the ESPP	796	1,193	857	1,199
Weighted average diluted shares outstanding	74,632	75,754	75,397	75,616