Investment Securities - Textual (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities
Available-for-sale Securities, Gross Unrealized Gain (Loss)	$ 12,891,000	$ 7,008,000
Threshold period of value decline in available-for-sale securities to be considered other than temporary impairment	12 months
Threshold percentage of value decline in available-for-sale securities to be considered other than temporary impairment	10.00%
Threshold amount of value decline in available-for-sale securities to be considered other than temporary impairment	10,000
Gross Unrealized Losses	1,721,000	2,666,000
Gross Unrealized Gains	14,612,000	9,674,000
Accumulated Other Comprehensive Income Available For Sale Securities Adjustment Tax	5,305,000	2,884,000
Available-for-sale investment securities	381,074,000	321,405,000
Available-for-sale securities pledged as collateral	89,343,000	109,119,000
U.S. Government agencies
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	4
Debt Securities, Amortized Cost	9,443,000	149,000
Gross Unrealized Losses	23,000	0
Gross Unrealized Gains	34,000	0
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Available-for-sale Securities, Number of Positions	196
Debt Securities, Amortized Cost	151,312,000	101,030,000
Gross Unrealized Losses	385,000	331,000
Gross Unrealized Gains	10,751,000	7,732,000
U.S. Government agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Available-for-sale Securities, Number of Positions	200
Debt Securities, Amortized Cost	206,465,000	204,222,000
Gross Unrealized Losses	1,107,000	1,080,000
Gross Unrealized Gains	3,152,000	1,402,000
Private label residential mortgage backed securities
Schedule of Available-for-sale Securities
Available-for-sale Securities, Gross Unrealized Gain (Loss)	117,000
Available-for-sale Securities, Number of Positions	23
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	6
Debt Securities, Amortized Cost	6,258,000	8,408,000
Gross Unrealized Losses	206,000	1,255,000
Available-for-sale, Securities in Unrealized Gain Positions, Number of Positions	17
Gross Unrealized Gains	323,000	245,000
Less than 12 months \| U.S. Government agencies
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	2
Less than 12 months \| Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	21
Less than 12 months \| U.S. Government agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	50
Greater than 12 months \| U.S. Government agencies
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	0
Greater than 12 months \| Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	0
Greater than 12 months \| U.S. Government agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	21
Below investment grade \| Private label residential mortgage backed securities
Schedule of Available-for-sale Securities
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(28,000)
Available-for-sale Securities, Number of Positions	7
Debt Securities, Amortized Cost	4,806,000
Securities Pledged as Collateral
Schedule of Available-for-sale Securities
Available-for-sale investment securities	$ 81,245,000	$ 102,527,000

Accumulated Other Comprehensive Income Available For Sale Securities Adjustment Tax

No definition available.

Name:	cvcy_AccumulatedOtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentTax
Namespace Prefix:	cvcy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Available-for-sale, Securities in Unrealized Gain Positions, Qualitative Disclosure, Number of Positions

+ References

No definition available.

+ Details

Name:	cvcy_AvailableForSaleSecuritiesInUnrealizedGainPositionsQualitativeDisclosureNumberOfPositions
Namespace Prefix:	cvcy_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Available-for-sale Securities, Number of Positions

+ References

No definition available.

+ Details

Name:	cvcy_AvailableForSaleSecuritiesNumberOfPositions
Namespace Prefix:	cvcy_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Threshold Amount of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment

+ References

No definition available.

+ Details

Name:	cvcy_ThresholdAmountOfValueDeclineInAvailableForSaleSecuritiesToBeConsideredOtherThanTemporaryImpairment
Namespace Prefix:	cvcy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Threshold Percentage of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment

+ References

No definition available.

+ Details

Name:	cvcy_ThresholdPercentageOfValueDeclineInAvailableForSaleSecuritiesToBeConsideredOtherThanTemporaryImpairment
Namespace Prefix:	cvcy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold Period of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment

+ References

No definition available.

+ Details

Name:	cvcy_ThresholdPeriodOfValueDeclineInAvailableForSaleSecuritiesToBeConsideredOtherThanTemporaryImpairment
Namespace Prefix:	cvcy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 7

-Footnote 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 19

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13, 19

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The net amount of gross unrealized gains (losses) for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 03-1

-Paragraph 21

-Subparagraph b(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 17

-Subparagraph b(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The fair value of available-for-sale securities that serve as collateral for borrowings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5086-111524

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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