Gain (Loss) On Repurchase Of Tax Receivables Agreement

No definition available.

Name:	max_GainLossOnRepurchaseOfTaxReceivablesAgreement
Namespace Prefix:	max_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Income tax disclosure.

+ References

No definition available.

+ Details

Name:	max_IncomeTaxDisclosureLineItems
Namespace Prefix:	max_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Payments For Purchase Of Tax Receivable Agreement Rights

+ References

No definition available.

+ Details

Name:	max_PaymentsForPurchaseOfTaxReceivableAgreementRights
Namespace Prefix:	max_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payments For Tax Receivable Agreement

+ References

No definition available.

+ Details

Name:	max_PaymentsForTaxReceivableAgreement
Namespace Prefix:	max_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Tax Receivable Agreement, Liability

+ References

No definition available.

+ Details

Name:	max_TaxReceivableAgreementLiability
Namespace Prefix:	max_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Tax Receivable Agreement, Liability, Current

+ References

No definition available.

+ Details

Name:	max_TaxReceivableAgreementLiabilityCurrent
Namespace Prefix:	max_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

+ Details

Name:	us-gaap_ConversionOfStockSharesConverted1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_RelatedPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=max_TaxReceivablesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=max_InsigniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Income taxes - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
Income taxes - Narrative (Details) - USD ($) $ in Thousands	Jun. 25, 2026	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2026	Dec. 31, 2025
Income Tax Disclosure [Line Items]
Effective income tax rate		24.20%	(1.40%)	26.20%	(1.10%)
Valuation allowance		$ 3,500		$ 3,500			$ 3,500
Conversion of stock (in shares)		0	0	0	0
Payments pursuant to tax receivable agreement				$ 6,990	$ 0
Repurchase of interests in tax receivables agreement				31,000	0
Gain on repurchase of interests in tax receivables agreement				37,651	0
Related Party \| Tax Receivables Agreement
Income Tax Disclosure [Line Items]
Tax receivable agreement, liability		$ 54,700		54,700		$ 123,400	131,100
Tax receivable agreement, liability, current		3,700		3,700			$ 6,900
Payments pursuant to tax receivable agreement		$ 0	$ 0	$ 7,000	$ 0
Gain on repurchase of interests in tax receivables agreement	$ 37,700
Related Party \| Tax Receivables Agreement \| Insignia
Income Tax Disclosure [Line Items]
Tax receivable agreement, liability						$ 68,700
Repurchase of interests in tax receivables agreement	$ 31,000