Net Income per Share (Additional Information) (Details) - shares		3 Months Ended
		Jun. 30, 2015	Jun. 30, 2014
Reconciliations of basic to diluted weighted-average common shares outstanding
Weighted-average shares used in basic computation		33,117,000	34,626,000
Dilutive effect of stock-based awards	[1]	0	0
Weighted-average shares used for diluted computation		33,117,000	34,626,000
Excluded NSUs
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	[1]	487,000	377,000
Excluded restricted stock units (RSUs)
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	[1]	487,000	729,000
Excluded outside director restricted stock awards (RSAs)
Options excluded in the computation of diluted income per share
Options excluded in the computation of diluted income per share (in shares)	[1]	8,000	7,000
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)	[1]	700,000	730,000

[1] .