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Share-Based Compensation (Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Shares
Outstanding, beginning of period (in shares)	944,600	873,200
Granted (in shares)	302,700	294,500
Exercised (in shares)	(36,000.0)	(97,700)
Forfeited or expired (in shares)	(155,300)	(125,400)
Outstanding, end of period (in shares)	1,056,000.0	944,600
Exercisable, end of period (in shares)	602,000.0	499,400
Weighted Average Exercise Price
Outstanding, beginning of period, weighted-average exercise price (in USD per share)	$ 38.45	$ 41.79
Granted, weighted-average exercise price (in USD per share)	30.53	29.46
Exercised, weighted-average exercise price (in USD per share)	27.96	30.02
Forfeited or expired, weighted-average exercise price (in USD per share)	41.18	47.16
Outstanding, end of period, weighted-average exercise price (in USD per share)	36.14	38.45
Exercisable, end of period, weighted-average exercise price (in USD per share)	$ 38.90	$ 37.87
Options, Additional Disclosures:
Outstanding, end of period, weighted-average remaining contractual term	6 years 10 months 24 days	7 years 2 months 12 days
Exercisable, end of period, weighted-average remaining contractual term	5 years 4 months 24 days	5 years 9 months 18 days
Outstanding, end of period, aggregate intrinsic value	$ 9,035	$ 2,477
Exercisable, end of period, aggregate intrinsic value	$ 4,756	$ 2,076

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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 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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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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 price at which option holders acquired shares when converting their stock options into shares.

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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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