Represents the aggregate annual rent payment associated with the contributed lease properties within the Pension Plan.

No definition available.

Name:	mni_AggregateAnnualRentPaymentsOnContributedProperty
Namespace Prefix:	mni_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents liabilities recorded by the entity related to financing obligations created by the entity's continuing involvement in properties sold or donated.

+ References

No definition available.

+ Details

Name:	mni_FinancingObligationsNotLongTermDebt
Namespace Prefix:	mni_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of gain (loss) on value of property contributed.

+ References

No definition available.

+ Details

Name:	mni_GainLossOnContributionOfProperty
Namespace Prefix:	mni_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The lease term for properties which the entity contributed to its pension plan and then leased back.

+ References

No definition available.

+ Details

Name:	mni_LeaseTermOfContributedProperty
Namespace Prefix:	mni_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the required pension contribution under the Employee Retirement Income Security Act for 2016.

+ References

No definition available.

+ Details

Name:	mni_RequiredPensionContribution
Namespace Prefix:	mni_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ 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 (b)(3)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

+ Details

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

- Details

Name:	us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

EMPLOYEE BENEFITS - Contributions (Details) - USD ($)	1 Months Ended	3 Months Ended
EMPLOYEE BENEFITS - Contributions (Details) - USD ($)	Feb. 29, 2016	Mar. 27, 2016	Dec. 27, 2015
Medical cost trend rates
Financing obligations		$ 74,829,000	$ 32,398,000
Pension plan
Medical cost trend rates
Value of contributions to plan	$ 47,100,000
Required pension contribution	$ 2,000,000
Term of leases entered into for property contributed to pension plan	11 years
Gain or loss recognized on the contribution of property		$ 0
Aggregate Annual Rent Payments On Contributed Property	$ 3,500,000