XML 31 R36.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value (Details 2) (Other Commercial Real Estate [Member], Fair Value, Inputs, Level 3 [Member], USD $)
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Jun. 30, 2014
Jun. 30, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]        
Fair Value $ 101us-gaap_AssetsFairValueDisclosure $ 101us-gaap_AssetsFairValueDisclosure $ 101us-gaap_AssetsFairValueDisclosure $ 101us-gaap_AssetsFairValueDisclosure
Valuation Technique Sales comparison approach   Sales comparison approach  
Unobservable Inputs   Adjustment for differences between comparable sales   Adjustment for differences between comparable sales
Weighted Average   22.52%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate   22.52%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
Minimum [Member]
       
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]        
Range   14.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FinancialInstrumentAxis
= cbkm_OtherCommercialRealEstateMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
  14.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FinancialInstrumentAxis
= cbkm_OtherCommercialRealEstateMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]
       
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]        
Range   31.90%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FinancialInstrumentAxis
= cbkm_OtherCommercialRealEstateMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
  31.90%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FinancialInstrumentAxis
= cbkm_OtherCommercialRealEstateMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember