XML 88 R77.htm IDEA: XBRL DOCUMENT
v3.20.2

FAIR VALUE MEASUREMENT AND DISCLOSURE (Summary of Assets Measured at Fair Value on Non Recurring Basis) (Details) - Other real estate owned - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items] |  |
Fair Value | $ 94 | $ 94
Company Determined Fair Value (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items] |  |
Fair Value | $ 94 | $ 94

X
- Definition Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items] + References No definition available. + Details
Name: | cac_FairValueAssetsAndLiabilitiesMeasuredOnNonrecurringBasisLineItems
Namespace Prefix: | cac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=cac_OtherRealEstateOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |