Earnings Per Share and Stock Plans 1 of 2 (Details) (USD $)	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Assumptions:
Risk-free interest rate	0.70%	0.41%	0.42%
Dividend yield	0.60%	0.00%	0.00%
Volatility factor	45.30%	53.30%	56.60%
Expected life	5 years 6 months	5 years 6 months	5 years 6 months
Stock Options
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock Options Outstanding	612,149
Weighted-average Exercise Price	18.86
Weighted-average Remaining Contractual Life	6 years 5 months 1 day
Stock Options Outstanding	309,435
Weighted- average Exercise Price	17.05
$10.01 to 20.00 \| Stock Options
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock Options Outstanding	458,159
Weighted-average Exercise Price	16.34
Weighted-average Remaining Contractual Life	6 years 1 month 6 days
Stock Options Outstanding	272,168
Weighted- average Exercise Price	16.08
$20.01 to 30.00 \| Stock Options
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock Options Outstanding	153,990
Weighted-average Exercise Price	26.36
Weighted-average Remaining Contractual Life	7 years 4 months 17 days
Stock Options Outstanding	37,267
Weighted- average Exercise Price	24.14

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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