Name:	chfc_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresPercentageSecuredByFirstLienRealEstateResidentialLoans
Namespace Prefix:	chfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Minimum percentage of tax benefit is recognized for the amount likely to be realized.

No definition available.

Name:	chfc_MinimumPercentageOfTaxBenefitIsRecognizedForAmountLikelyToBeRealized
Namespace Prefix:	chfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Number of banks through which company operates.

No definition available.

Name:	chfc_NumberOfBanksThroughWhichCompanyOperates
Namespace Prefix:	chfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of regional banking units.

No definition available.

Name:	chfc_NumberOfRegionalBankingUnits
Namespace Prefix:	chfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Reserve for contingent income tax liabilities recorded.

No definition available.

Name:	chfc_ReserveForContingentIncomeTaxLiabilitiesRecorded
Namespace Prefix:	chfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Significant Partner in Low Income Housing Tax Credit Partnership, Number of Partnerships

No definition available.

Name:	chfc_SignificantPartnerInLowIncomeHousingTaxCreditPartnershipNumberOfPartnerships
Namespace Prefix:	chfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Variable Interest Entity, Reporting Entity Involvement, Unfunded Obligation, Amount

No definition available.

Name:	chfc_VariableInterestEntityReportingEntityInvolvementUnfundedObligationAmount
Namespace Prefix:	chfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5728-111685

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5747-111685

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS140-4/FIN46(R)

-Paragraph C6

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.