Debt Instrument, Credit Spread Adjustment On Variable Rate

No definition available.

Name:	mh_DebtInstrumentCreditSpreadAdjustmentOnVariableRate
Namespace Prefix:	mh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Variable Rate, Floor

+ References

No definition available.

+ Details

Name:	mh_DebtInstrumentVariableRateFloor
Namespace Prefix:	mh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility, Fixed Charge Coverage Ratio, Minimum

+ References

No definition available.

+ Details

Name:	mh_LineOfCreditFacilityFixedChargeCoverageRatioMinimum
Namespace Prefix:	mh_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility, Fixed Charge Coverage Ratio, Threshold, Amount

+ References

No definition available.

+ Details

Name:	mh_LineOfCreditFacilityFixedChargeCoverageRatioThresholdAmount
Namespace Prefix:	mh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line Of Credit Facility, Fixed Charge Coverage Ratio, Threshold, Percentage

+ References

No definition available.

+ Details

Name:	mh_LineOfCreditFacilityFixedChargeCoverageRatioThresholdPercentage
Namespace Prefix:	mh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Unused Capacity, Above Threshold, Commitment Fee Percentage

+ References

No definition available.

+ Details

Name:	mh_LineOfCreditFacilityUnusedCapacityAboveThresholdCommitmentFeePercentage
Namespace Prefix:	mh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Unused Capacity, Equal To Or Below Threshold, Commitment Fee Percentage

+ References

No definition available.

+ Details

Name:	mh_LineOfCreditFacilityUnusedCapacityEqualToOrBelowThresholdCommitmentFeePercentage
Namespace Prefix:	mh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Unused Capacity Threshold, Percentage

+ References

No definition available.

+ Details

Name:	mh_LineOfCreditFacilityUnusedCapacityThresholdPercentage
Namespace Prefix:	mh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-1A

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-15

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-12

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fee for available but unused credit capacity under the credit facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=mh_ABLRevolvingCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=mh_NonBaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mh_VariableRateComponentAxis=mh_VariableRateComponentOneMonthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mh_VariableRateComponentAxis=mh_VariableRateComponentThreeMonthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_DomesticLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ForeignLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - A&E ABL Revolving Credit Facilities (Details) $ in Thousands		1 Months Ended		3 Months Ended
	Aug. 06, 2024 USD ($)	May 31, 2024	Apr. 30, 2023	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2025 USD ($)	Aug. 05, 2024 USD ($)	Jul. 30, 2021 USD ($)
Line of Credit Facility [Line Items]
Unamortized deferred financing costs				$ 16,682		$ 17,412
ABL Revolving Credit Agreement
Line of Credit Facility [Line Items]
Letters of credit outstanding				4,030
ABL Revolving Credit Agreement \| U.S. and RoW Revolving Credit Facility \| Base Rate
Line of Credit Facility [Line Items]
Variable rate floor	1.50%
ABL Revolving Credit Agreement \| U.S. and RoW Revolving Credit Facility \| Term SOFR
Line of Credit Facility [Line Items]
Variable rate floor	0.00%
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. and RoW Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 300,000						$ 200,000
Credit spread adjustment			0.10%
Unused line fee percentage when percentage of aggregate commitments is equal to or below the threshold	0.25%
Unused line fee threshold percentage	50.00%
Unused line fee percentage when percentage of aggregate commitments is equal to or below the threshold	0.375%
Borrowing capacity available				300,000
Fees on unutilized commitments				264	$ 186
Unamortized deferred financing costs				$ 3,617
Fixed charge coverage ratio threshold percentage				10.00%
Fixed charge coverage ratio threshold amount				$ 18,750
Minimum fixed charge coverage ratio				1.00
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. and RoW Revolving Credit Facility \| Non-Base Rate \| Minimum
Line of Credit Facility [Line Items]
Margin	1.25%
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. and RoW Revolving Credit Facility \| Non-Base Rate \| Maximum
Line of Credit Facility [Line Items]
Margin	1.75%
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. and RoW Revolving Credit Facility \| Base Rate \| Minimum
Line of Credit Facility [Line Items]
Margin	0.25%
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. and RoW Revolving Credit Facility \| Base Rate \| Maximum
Line of Credit Facility [Line Items]
Margin	0.75%
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. and RoW Revolving Credit Facility \| Variable Rate Component, One-Month
Line of Credit Facility [Line Items]
Credit spread adjustment		0.29547%
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. and RoW Revolving Credit Facility \| Variable Rate Component, Three-Month
Line of Credit Facility [Line Items]
Credit spread adjustment		0.32138%
ABL Revolving Credit Agreement \| Revolving Credit Facility \| U.S. Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 265,000							$ 165,000
ABL Revolving Credit Agreement \| Revolving Credit Facility \| RoW Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 35,000							$ 35,000