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LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES (Details) $ in Millions | Dec. 31, 2022 USD ($)
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LIMITS ON DIVIDENDS AND OTHER REVENUE SOURCES |
Undivided profits legally available for the payments of dividends | $ 173.1
Percentage of Bank's capital and surplus that can be transferred to Company, maximum | 10.00%
Aggregate percentage of Bank's capital and surplus that can be transferred to Company, maximum | 20.00%

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- Definition The aggregate maximum percentage of the Bank's capital and surplus that can be transferred to Company. + References No definition available. + Details
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- Definition The maximum percentage of the Bank's capital and surplus that can be transferred to Company. + References No definition available. + Details
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Namespace Prefix: | cbu_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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X
- Definition Amount of dividends available for payment after computation of statutory restrictions on capital surplus. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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