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Share-based Payments, Performance Stock Units (Details) - Performance Stock Units [Member] | 3 Months Ended
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Jun. 30, 2024 USD ($) $ / shares shares | Jun. 30, 2023 d $ / shares shares
Performance Stock Units ("PSUs") [Abstract] |  |
Number of trading days | d |  | 30
Vesting period | 3 years | 3 years
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract] |  |
Risk free interest rate | 4.45% | 4.32%
Expected life in years | 3 years |
Expected volatility of MPA common stock | 59.80% | 54.20%
Average correlation coefficient of peer companies | 16.50% | 0.00%
Expected dividend yield | 0.00% | 0.00%
Grant date fair value (in dollars per share) | $ 8.65 |
Number of Shares [Roll Forward] |  |
Non-vested at beginning of period (in shares) | shares | 773,923 |
Granted (in shares) | shares | 155,391 | 533,856
Added by performance factor (in shares) | shares | 10,952 |
Vested (in shares) | shares | (32,848) |
Forfeited/Cancelled (in shares) | shares | (52,137) |
Non-vested at end of period (in shares) | shares | 855,281 |
Weighted Average Grant Date Fair Value [Roll Forward] |  |
Non-vested at beginning of period (in dollars per share) | $ 7.73 |
Granted (in dollars per share) | 8.65 |
Added by performance factor (in dollars per share) | 22.27 |
Vested (in dollars per share) | 22.27 |
Forfeited/Cancelled (in dollars per share) | 23.27 |
Non-vested at end of period (in dollars per share) | $ 6.58 |
Total unrecognized compensation expense | $ | $ 2,280,000 |
Weighted average remaining vesting period over which compensation expense is expected to be recognized | 2 years 1 month 6 days |
Market capitalization | $ | $ 600,000,000 |
Minimum [Member] |  |
Performance Stock Units ("PSUs") [Abstract] |  |
Awards vesting target percentage | 0.00% |
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract] |  |
Expected life in years |  | 9 months 18 days
Grant date fair value (in dollars per share) |  | $ 3.57
Maximum [Member] |  |
Performance Stock Units ("PSUs") [Abstract] |  |
Awards vesting target percentage | 150.00% |
Monte Carlo valuation model assumptions used in determining the fair value of the TSR awards [Abstract] |  |
Expected life in years |  | 1 year 9 months 18 days
Grant date fair value (in dollars per share) |  | $ 5.06
Tranche One [Member] |  |
Performance Stock Units ("PSUs") [Abstract] |  |
Stock price (in dollars per share) |  | $ 10
Percentage of vesting of award |  | 33.00%
Tranche Two [Member] |  |
Performance Stock Units ("PSUs") [Abstract] |  |
Stock price (in dollars per share) |  | $ 15
Percentage of vesting of award |  | 33.00%
Tranche Three [Member] |  |
Performance Stock Units ("PSUs") [Abstract] |  |
Stock price (in dollars per share) |  | $ 20
Percentage of vesting of award |  | 33.00%
Tranche Three [Member] | Minimum [Member] |  |
Performance Stock Units ("PSUs") [Abstract] |  |
Stock price (in dollars per share) |  | $ 17.5
Eligible vesting percentage for recipients |  | 50.00%
Tranche Three [Member] | Maximum [Member] |  |
Performance Stock Units ("PSUs") [Abstract] |  |
Stock price (in dollars per share) |  | $ 25
Eligible vesting percentage for recipients |  | 150.00%

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued 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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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