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General (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 27, 2014	Nov. 28, 2013	Nov. 27, 2014	Nov. 28, 2013
Service cost	$ 174us-gaap_DefinedBenefitPlanServiceCost	$ 175us-gaap_DefinedBenefitPlanServiceCost	$ 349us-gaap_DefinedBenefitPlanServiceCost	$ 351us-gaap_DefinedBenefitPlanServiceCost
Interest cost	311us-gaap_DefinedBenefitPlanInterestCost	294us-gaap_DefinedBenefitPlanInterestCost	622us-gaap_DefinedBenefitPlanInterestCost	587us-gaap_DefinedBenefitPlanInterestCost
Net amortization of prior service cost and actuarial loss	81mcs_DefinedBenefitPlanNetAmortizationOfPriorServiceCostAndActuarialLoss	67mcs_DefinedBenefitPlanNetAmortizationOfPriorServiceCostAndActuarialLoss	162mcs_DefinedBenefitPlanNetAmortizationOfPriorServiceCostAndActuarialLoss	134mcs_DefinedBenefitPlanNetAmortizationOfPriorServiceCostAndActuarialLoss
Net periodic pension cost	$ 566us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost	$ 536us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost	$ 1,133us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost	$ 1,072us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost

X

- Definition

The amount of the prior service cost in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation and actuarial losses.

+ References

No definition available.

+ Details

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Namespace Prefix:	mcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(2)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(1)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Service Cost (Component of Net Periodic Pension Cost)

-URI http://asc.fasb.org/extlink&oid=6525008



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration