XML 40 R30.htm IDEA: XBRL DOCUMENT
v3.25.3

Leases - Narrative (Details) $ in Thousands | Sep. 30, 2025 USD ($)
--- | ---
Deferred rent payments under operating lease | $ 478
Long-Term Operating Lease Obligations |
Deferred rent payments under operating lease | $ 28
Minimum |
Lease terms (in years) | 1 year
Maximum |
Lease terms (in years) | 45 years

X
- Definition Amount of deferred rent payments under the operating leases. + References No definition available. + Details
Name: | mcs_OperatingLeaseDeferredRentPayments
Namespace Prefix: | mcs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=mcs_LongTermOperatingLeaseObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |