Represents the information pertaining to number of note purchase agreements.

No definition available.

Name:	mcs_NumberOfPurchaseAgreements
Namespace Prefix:	mcs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of fee payable to each note holder.

+ References

No definition available.

+ Details

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Namespace Prefix:	mcs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of fee payable to each note holder quarterly.

+ References

No definition available.

+ Details

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Namespace Prefix:	mcs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

No definition available.

+ Details

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

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

Name:	us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Balance Type:
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- Details

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Namespace Prefix:
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- Details

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Long-Term Debt and Short-Term Borrowings - Amendments to Note Purchase Agreements (Details) $ in Thousands		12 Months Ended
	Sep. 22, 2020	Dec. 30, 2021 USD ($) agreement	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Senior notes, noncurrent		$ 90,000	$ 100,000
Percentage of fee payable to each note holder	0.975%
Percentage of fee payable to each note holder quarterly	0.24375%
Note Purchase Agreement
Debt Instrument [Line Items]
Senior notes, noncurrent		$ 90,000
Number of agreements \| agreement		2
Note Purchase Agreement \| Minimum
Debt Instrument [Line Items]
Interest rate		4.02%
Note Purchase Agreement \| Maximum
Debt Instrument [Line Items]
Interest rate		4.32%
Senior Notes
Debt Instrument [Line Items]
Senior notes, noncurrent		$ 90,000
Weighted average interest rate		4.19%	4.17%