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Stock-Based Compensation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Stock-Based Compensation [Abstract]
Stock-based compensation cost	$ 1.2	$ 0.9	$ 4.2	$ 3.6
Assumptions used in determining fair value of options [Abstract]
Expected life of awards			6 years 3 months 18 days	6 years 3 months 18 days
Risk-free interest rate			1.90%	2.10%
Expected volatility of the Company's stock			66.90%	76.10%
Expected dividend yield on the Company's stock			0.00%	0.00%
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized compensation cost	10.4		$ 10.4
Weighted-average remaining service period			2 years 6 months
Stock Options [Member]
Type and fair value of stock-based compensation awards granted [Abstract]
Options granted (in shares)			0.2	0.1
Options, grant date fair value (in dollars per share)			$ 7.11	$ 10.21
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized compensation cost	2.3		$ 2.3
Weighted-average remaining service period			2 years 7 months 6 days
Restricted Stock - Retention [Member]
Type and fair value of stock-based compensation awards granted [Abstract]
Stock granted (in shares)			0.3	0.2
Fair value of stock granted (in dollars per share)			$ 11.39	$ 14.94
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized compensation cost	5.5		$ 5.5
Weighted-average remaining service period			2 years 7 months 6 days
Restricted Stock - Performance Based [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period			3 years
Type and fair value of stock-based compensation awards granted [Abstract]
Stock granted (in shares)			0.2	0.2
Fair value of stock granted (in dollars per share)			$ 11.39	$ 14.94
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized compensation cost	$ 2.6		$ 2.6
Weighted-average remaining service period			2 years
Unrestricted Stock [Member]
Type and fair value of stock-based compensation awards granted [Abstract]
Stock granted (in shares)			0.1	0.1
Fair value of stock granted (in dollars per share)			$ 10.45	$ 14.83

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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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