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Fair Value Measurements (Textual) (Details) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Fair Value Measurements (Textual) [Abstract]      
Impairment of goodwill $ 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss $ 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss $ 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Valuation Allowance on Mortgage Servicing Rights 200,000chfc_ValuationAllowanceonMortgageServicingRights 200,000chfc_ValuationAllowanceonMortgageServicingRights  
Core deposit intangible assets [Member]      
Fair Value Measurements (Textual) [Abstract]      
Impairment identified for intangible assets 0chfc_IntangibleAssetImpairedAccumulatedImpairmentLoss
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
0chfc_IntangibleAssetImpairedAccumulatedImpairmentLoss
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
0chfc_IntangibleAssetImpairedAccumulatedImpairmentLoss
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CoreDepositsMember
Maximum [Member]      
Fair Value Measurements (Textual) [Abstract]      
Expected life of intangible assets 15 years    
Minimum [Member]      
Fair Value Measurements (Textual) [Abstract]      
Expected life of intangible assets 10 years    
Total Impaired Loans [Member] | Maximum [Member]      
Fair Value Measurements (Textual) [Abstract]      
Percentage of discount factors used to determine fair value 80.00%chfc_PercentageOfDiscountFactorsUsedToDetermineFairValue
/ us-gaap_FairValueByAssetClassAxis
= chfc_TotalImpairedLoansMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Total Impaired Loans [Member] | Minimum [Member]      
Fair Value Measurements (Textual) [Abstract]      
Percentage of discount factors used to determine fair value 70.00%chfc_PercentageOfDiscountFactorsUsedToDetermineFairValue
/ us-gaap_FairValueByAssetClassAxis
= chfc_TotalImpairedLoansMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Other Real Estate and Repossessed Assets [Member] | Maximum [Member]      
Fair Value Measurements (Textual) [Abstract]      
Percentage of discount factors used to determine fair value 75.00%chfc_PercentageOfDiscountFactorsUsedToDetermineFairValue
/ us-gaap_FairValueByAssetClassAxis
= chfc_OtherRealEstateAndRepossessedAssetsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Other Real Estate and Repossessed Assets [Member] | Minimum [Member]      
Fair Value Measurements (Textual) [Abstract]      
Percentage of discount factors used to determine fair value 70.00%chfc_PercentageOfDiscountFactorsUsedToDetermineFairValue
/ us-gaap_FairValueByAssetClassAxis
= chfc_OtherRealEstateAndRepossessedAssetsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Fair Value Measurements Recurring [Member]      
Fair Value Measurements (Textual) [Abstract]      
Liabilities recorded at fair value 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measurements Nonrecurring [Member]      
Fair Value Measurements (Textual) [Abstract]      
Liabilities recorded at fair value $ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
$ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
$ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember