Share-based Compensation - Stock Options Rollforward (Details) (Stock Options [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Mar. 31, 2013
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options, Outstanding at beginning of period	971,001
Number of Options, Granted	0
Number of Options, Exercised	(66,667)
Number of Options, Cancelled/expired	(154,834)
Number of Options, Outstanding and exercisable at end of period	749,500
Weighted Average Exercise Price, Outstanding at beginning of period	$ 13.52
Weighted Average Exercise Price, Granted	$ 0.00
Weighted-Average Exercise Price, Exercised	$ 2.51
Weighted-Average Exercise Price, Cancelled/Expired	$ 14.76
Weighted Average Exercise Price, Outstanding and exercisable at end of period	$ 14.25
Remaining Contractual Term, Outstanding and exercisable at end of period	3 years 26 days
Aggregate Intrinsic Value, Outstanding and exercisable at end of period	$ 353

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including 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 price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Number of share options (or share units) exercised during the current period.

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