Net Income per Share (Additional Information) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Reconciliations of basic to diluted weighted-average common shares outstanding
Weighted-average shares used in basic computation	32,341	34,537	32,655	34,598
Dilutive effect of stock-based awards	502	316	502	314
Weighted-average shares used in diluted computation	32,843	34,853	33,157	34,912
Excluded NSUs
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	175	140	175	140
Excluded RSUs
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	521	642	521	642
Excluded stock appreciation rights (SARs)
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	90	525	90	525