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Investments - Realized gains and losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Proceeds from sales or calls | $ 225 | $ 32,647 | $ 500 | $ 64,229
Gross realized gains from sales or calls | 0 | 0 | 0 | 0
Gross realized losses from sales or calls | $ (26) | $ (1,853) | $ (41) | $ (4,199)

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- Definition Marketable Security, Realized Gain + References No definition available. + Details
Name: | cvcy_MarketableSecurityRealizedGain
Namespace Prefix: | cvcy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Marketable Security, Realized Loss + References No definition available. + Details
Name: | cvcy_MarketableSecurityRealizedLoss
Namespace Prefix: | cvcy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References No definition available. + Details
Name: | us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration