Employee Benefit Plans (Details) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Employee Benefit Plans [Line item]
Minimum age of employees for Benefit Plans	18 years
Percentage of contribution matched	100.00%
Percentage of employee contribution	6.00%
Employers matching contribution vesting percentage	100.00%	100.00%
Amount of contributed to the plan	$ 308,000	$ 327,000

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

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

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

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No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of employer's matching contributions to a defined contribution plan that vests in year.

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No definition available.

+ Details

Name:	vabk_DefinedContributionPlanEmployersMatchingContributionVestingPercentage
Namespace Prefix:	vabk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employee gross pay the employee may contribute to a defined contribution plan on which the employer will match.

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No definition available.

+ Details

Name:	vabk_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercentOnWhichEmployerWillMatch
Namespace Prefix:	vabk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the minimum age of employees for Benefit Plans.

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No definition available.

+ Details

Name:	vabk_MinimumAgeOfEmployeesForBenefitPlans
Namespace Prefix:	vabk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration