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Leases - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 26, 2019	Dec. 27, 2018
Finance Lease, Right-of-Use Asset	$ 74,348,000	$ 72,631,000
Digital Systems [Member]
Finance Lease, Right-of-Use Asset	45,510,000	45,510,000
Commitment Minimum Lease Payments	6,163,000
Obligation To Be Reduced In Next 12 Months	140,000
Finite-Lived Intangible Assets, Accumulated Amortization	$ 45,279,000	$ 40,647,000
Lease Term Contract	12 months

X

- Definition

The minimum lease payment of commitment during the period.

+ References

No definition available.

+ Details

Name:	mcs_CommitmentMinimumLeasePayments
Namespace Prefix:	mcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Term of lease in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	mcs_LeaseTermContract
Namespace Prefix:	mcs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of expected reduction in capital lease obligation within the next 12 months.

+ References

No definition available.

+ Details

Name:	mcs_ObligationToBeReducedInNext12Months
Namespace Prefix:	mcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's right to use underlying asset under finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

+ Details

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

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=mcs_DigitalSystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: