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Stock-Based Compensation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Stock-Based Compensation [Abstract] |  |  |  |  |
Stock-based compensation expense |  | $ 2.1 | $ 0.8 | $ 4.2 | $ 5.2
Stock-Based Compensation [Abstract] |  |  |  |  |
Unrecognized compensation expense |  | 11.0 |  | $ 11.0 |
Weighted-average remaining service period |  |  |  | 2 years 9 months 18 days |
Stock Options [Member] |  |  |  |  |
Type and fair value of stock-based compensation awards granted [Abstract] |  |  |  |  |
Options granted (in shares) |  |  |  | 0.4 | 0.3
Fair value of options granted (in dollars per share) |  |  |  | $ 3.46 | $ 5.56
Assumptions used in determining fair value of options [Abstract] |  |  |  |  |
Expected life of awards |  |  |  | 6 years 1 month 6 days | 6 years 3 months 18 days
Risk-free interest rate |  |  |  | 0.40% | 2.20%
Expected volatility of the Company's stock |  |  |  | 54.10% | 39.20%
Expected dividend yield on the Company's stock |  |  |  | 0.00% | 0.00%
Stock-Based Compensation [Abstract] |  |  |  |  |
Unrecognized compensation expense |  | 2.3 |  | $ 2.3 |
Weighted-average remaining service period |  |  |  | 3 years |
Restricted Stock Awards [Member] |  |  |  |  |
Type and fair value of stock-based compensation awards granted [Abstract] |  |  |  |  |
Stock granted (in shares) |  |  |  | 0.6 | 0.3
Fair value of stock granted (in dollars per share) |  |  |  | $ 8.34 | $ 13.26
Stock-Based Compensation [Abstract] |  |  |  |  |
Unrecognized compensation expense |  | 8.1 |  | $ 8.1 |
Weighted-average remaining service period |  |  |  | 2 years 10 months 24 days |
Performance Stock Awards [Member] |  |  |  |  |
Type and fair value of stock-based compensation awards granted [Abstract] |  |  |  |  |
Stock granted (in shares) | [1] |  |  | 0.0 | 0.3
Fair value of stock granted (in dollars per share) | [1] |  |  | $ 0 | $ 13.26
Period of time to average cash flow return on invested capital |  |  |  | 3 years |
Period of time to average revenue growth |  |  |  | 3 years |
Performance period |  |  |  | 3 years |
Stock-Based Compensation [Abstract] |  |  |  |  |
Unrecognized compensation expense |  | $ 0.6 |  | $ 0.6 |
Weighted-average remaining service period |  |  |  | 1 year 2 months 12 days |
Unrestricted Stock Awards [Member] |  |  |  |  |
Type and fair value of stock-based compensation awards granted [Abstract] |  |  |  |  |
Stock granted (in shares) |  |  |  | 0.2 | 0.1
Fair value of stock granted (in dollars per share) |  |  |  | $ 5.21 | $ 14.50
[1] | In lieu of performance-based stock awards, the Company granted performance cash awards to the LTIP participants in fiscal 2021. The performance metrics for the cash awards are based upon a target three-year average cash flow return on invested capital and a target three-year average revenue growth at the end of the three-year performance period ending March 31, 2023. These performance metrics are the same as the metrics for the fiscal 2020 and 2019 performance-based stock awards.

X
- Definition The period of time cash flow return on invested capital is averaged as a performance metric for cash awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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- Definition The period of time revenue growth is averaged as a performance metric for cash awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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- Definition The period of time performance is measured for cash awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
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