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Employee Benefits - 401(k) and profit sharing plan (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
401(k) plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Requisite service period	1 month
Employer contribution amount	$ 499us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember	$ 382us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember	$ 388us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember
Profit sharing plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Requisite service period	2 years
Percentage vesting annually	100.00%us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage / cvcy_DefinedContributionPlanTypeAxis = cvcy_ProfitSharingMember
Employer contribution amount	$ 0us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / cvcy_DefinedContributionPlanTypeAxis = cvcy_ProfitSharingMember	$ 225us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / cvcy_DefinedContributionPlanTypeAxis = cvcy_ProfitSharingMember	$ 210us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / cvcy_DefinedContributionPlanTypeAxis = cvcy_ProfitSharingMember
Up to 3% of eligible compensation | 401(k) plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer matching of employee contributions, percentage	100.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember / us-gaap_RangeAxis = cvcy_RangeOneMember
Employer matching contribution, percentage of compensation	3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember / us-gaap_RangeAxis = cvcy_RangeOneMember
Over 3% of eligible compensation | 401(k) plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer matching of employee contributions, percentage	50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember / us-gaap_RangeAxis = cvcy_RangeTwoMember
Employer matching contribution, percentage of compensation	3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember / us-gaap_RangeAxis = cvcy_RangeTwoMember
Maximum | 401(k) plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer matching contribution, percentage of compensation	5.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / cvcy_DefinedContributionPlanTypeAxis = cvcy_EmployeeSavingsPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

Defined Contribution Plan Requisite Service Period

+ References

No definition available.

+ Details

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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- Definition

Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

+ References

No definition available.

+ Details

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- Details

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- Details

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