Net Income (Loss) per Share (Additional Information) (Details) - shares	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reconciliations of basic to diluted weighted-average common shares outstanding
Weighted-average shares used in basic computation	32,057,000	32,511,000	32,041,000	32,812,000
Dilutive effect of stock-based awards	365,000	264,000	0	0
Weighted-average shares used in diluted computation	32,422,000	32,775,000	32,041,000	32,812,000
Excluded NSUs
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	131,000	177,000	420,000	480,000
Excluded RSUs
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	396,000	457,000	396,000	457,000
Restricted Stock
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	0	0	10,000	9,000
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)	90,000	510,000	480,000	700,000