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DEPOSITS - Additional Information (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Deposits [Abstract] |  |
Certificates of deposit of $250 thousand or more | $ 203.4 | $ 131.1
Brokered deposits | 261.9 | 185.0
Reciprocal deposits | $ 903.2 | $ 924.6

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- Definition Interest Bearing Domestic Deposit, Reciprocal + References No definition available. + Details
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Balance Type: | credit
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- Definition Time Deposits 250000 Or More + References No definition available. + Details
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Namespace Prefix: | ccne_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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- Definition Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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