Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017 USD ($) component quarter	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) component quarter	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of primary components \| component	2		2
Lookback period used in reserve analysis \| quarter	20		20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 9,214	$ 10,136	$ 9,326	$ 9,610
Provision charged to operations	(150)	(4,600)	(250)	(4,850)
Losses charged to allowance	(27)	(105)	(210)	(118)
Recoveries	260	4,441	431	5,230
Allowance for credit losses, ending balance	9,297	9,872	9,297	9,872
Ending balance: individually evaluated for impairment	76		76		$ 307
Ending balance: collectively evaluated for impairment	9,221		9,221		9,019
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	2,021	3,743	2,180	3,562
Provision charged to operations	(7)	(4,673)	(244)	(4,825)
Losses charged to allowance	0	0	(44)	(4)
Recoveries	182	3,902	304	4,239
Allowance for credit losses, ending balance	2,196	2,972	2,196	2,972
Ending balance: individually evaluated for impairment	1		1		3
Ending balance: collectively evaluated for impairment	2,195		2,195		2,177
Real Estate Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,225	5,281	6,200	5,204
Provision charged to operations	(346)	(56)	(304)	(395)
Losses charged to allowance	0	0	(22)	0
Recoveries	52	435	57	851
Allowance for credit losses, ending balance	5,931	5,660	5,931	5,660
Ending balance: individually evaluated for impairment	29		29		241
Ending balance: collectively evaluated for impairment	5,902		5,902		5,959
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	775	894	852	734
Provision charged to operations	19	55	15	188
Losses charged to allowance	(27)	(105)	(144)	(114)
Recoveries	26	104	70	140
Allowance for credit losses, ending balance	793	948	793	948
Ending balance: individually evaluated for impairment	46		46		63
Ending balance: collectively evaluated for impairment	747		747		789
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	193	218	94	110
Provision charged to operations	184	74	283	182
Losses charged to allowance	0	0	0	0
Recoveries	0	0	0	0
Allowance for credit losses, ending balance	377	$ 292	377	$ 292
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	$ 377		$ 377		$ 94

Financing Receivable, Allowance for Credit Losses, Methodology Change, Number of Rolling Quarters Used in Analysis

No definition available.

Name:	cvcy_FinancingReceivableAllowanceForCreditLossesMethodologyChangeNumberOfRollingQuartersUsedInAnalysis
Namespace Prefix:	cvcy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loans and Leases Receivable, Allowance, Number of Components

+ References

No definition available.

+ Details

Name:	cvcy_LoansandLeasesReceivableAllowanceNumberofComponents
Namespace Prefix:	cvcy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

Name:	us-gaap_ProvisionForLoanLeaseAndOtherLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cvcy_RealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_UnallocatedFinancingReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: