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Stock-based Compensation Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Stock-based Compensation Option Activity
Balance at beginning of period	3,998	4,462
Granted	195	229
Exercised	(574)	(329)
Cancelled/forfeited	(97)	(134)
Balance at end of period	3,522	4,228
Weighted-average exercise price of options granted during period	$ 8.47	$ 5.28
Total intrinsic value of options exercised during the period	$ 8,525	$ 3,537
Weighted Average Remaining recognition period in years	2 years 187 days	1 year 342 days

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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

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

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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