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Income Taxes - Additional Information (Details) - USD ($) | 3 Months Ended
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Apr. 01, 2021 | Apr. 01, 2021 | Mar. 26, 2020
Income Taxes |  |  |
Effective Income Tax Rate, Adjusted For Losses From Noncontrolling Interests |  | 27.70% | 25.30%
Income tax refund claims | $ 24,200,000 | $ 24,200,000 |
Proceeds from tax refunds | $ 5,900,000 | $ 5,900,000 |

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- Definition The effective income tax rate of the company during the period. + References No definition available. + Details
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Namespace Prefix: | mcs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of income tax refund claimed by the entity, after reviewing the provisions of CARES Act. + References No definition available. + Details
Name: | mcs_IncomeTaxRefundClaimsCaresAct
Namespace Prefix: | mcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586 + Details
Name: | us-gaap_ProceedsFromIncomeTaxRefunds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration