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v2.4.1.9

Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2011 Subcontractor Employee | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | May 01, 2012
Operating Leases, Rent, Net [Abstract] |  |  |  |  |
Operating lease expense |  | $ 6,576,000 us-gaap_LeaseAndRentalExpense | $ 9,826,000 us-gaap_LeaseAndRentalExpense | $ 11,544,000 us-gaap_LeaseAndRentalExpense |
Sublease income |  | 119,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 | 531,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 | 671,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 |
Net expense |  | 6,457,000 us-gaap_OperatingLeasesRentExpenseNet | 9,295,000 us-gaap_OperatingLeasesRentExpenseNet | 10,873,000 us-gaap_OperatingLeasesRentExpenseNet |
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |  |  |
Operating Leases, Lease Commitments Due in 2014 |  | 3,859,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent |  |  |
Operating Leases, Lease Commitments Due in 2015 |  | 2,367,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears |  |  |
Operating Leases, Lease Commitments Due in 2016 |  | 1,939,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears |  |  |
Operating Leases, Lease Commitments Due in 2017 |  | 871,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears |  |  |
Operating Leases, Lease Commitments Due in 2018 |  | 316,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears |  |  |
Operating Leases, Lease Commitments Due Thereafter |  | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter |  |  |
Operating Leases, Lease Commitments Due Total |  | 9,352,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |  |  |
Operating Leases, Future Minimum Payments Receivable [Abstract] |  |  |  |  |
Operating Leases, Sublease Income Due in 2014 |  | 246,000 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent |  |  |
Operating Leases, Sublease Income Due in 2015 |  | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears |  |  |
Operating Leases, Sublease Income Due in 2016 |  | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears |  |  |
Operating Leases, Sublease Income Due in 2017 |  | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears |  |  |
Operating Leases, Sublease Income Due in 2018 |  | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears |  |  |
Operating Leases, Sublease Income Due Thereafter |  | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter |  |  |
Operating Leases, Sublease Income Due Total |  | 246,000 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable |  |  |
Operating Leases, Future Minimum Payments, Net Commitments [Abstract] |  |  |  |  |
Operating Leases, Net Commitments Due in 2014 |  | 3,613,000 vsec_OperatingLeasesFutureMinimumPaymentsNetCommitments |  |  |
Operating Leases, Net Commitments Due in 2015 |  | 2,367,000 vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueInYearTwo |  |  |
Operating Leases, Net Commitments Due in 2016 |  | 1,939,000 vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueInYearThree |  |  |
Operating Leases, Net Commitments Due in 2017 |  | 871,000 vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueInYearFour |  |  |
Operating Leases, Net Commitments Due in 2018 |  | 316,000 vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueInYearFive |  |  |
Operating Leases, Net Commitments Due Thereafter |  | 0 vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueThereafter |  |  |
Operating Leases, Net Commitments Due Total |  | 9,106,000 vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueTotal |  |  |
Capital Leases, Lease Commitments [Abstract] |  |  |  |  |
Capital Leases, Lease Commitments Due in 2014 |  | 3,985,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent |  |  |
Capital Leases, Lease Commitments Due in 2015 |  | 4,104,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears |  |  |
Capital Leases, Lease Commitments Due in 2016 |  | 4,221,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears |  |  |
Capital Leases, Lease Commitments Due in 2017 |  | 4,336,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears |  |  |
Capital Leases, Lease Commitments Due in 2018 |  | 4,456,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears |  |  |
Capital Leases, Lease Commitments Due Thereafter |  | 36,447,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter |  |  |
Capital Leases, Lease Commitments, Total |  | 57,549,000 us-gaap_CapitalLeasesFutureMinimumPaymentsDue |  |  |
Capitalization of Construction Costs |  |  |  |  | 27,300,000 vsec_CapitalizationOfConstructionCosts
Long term Construction Costs Liability |  |  |  |  | $ 27,300,000 vsec_LongTermConstructionCostsLiability
Contingencies [Abstract] |  |  |  |  |
Number of subcontractors that operated the facility | 1 vsec_NumberOfSubcontractorsThatOperatedFacility |  |  |  |
Number of deaths of subcontractor employees | 5 vsec_NumberOfDeathsOfSubcontractorEmployees |  |  |  |
Building Facilities [Member] |  |  |  |  |
Lease Obligations [Line Items] |  |  |  |  |
Term of Lease |  | 15 years |  |  |
Operating Leases [Member] | Minimum [Member] |  |  |  |  |
Lease Obligations [Line Items] |  |  |  |  |
Term of Lease |  | 2 years |  |  |
Operating Leases [Member] | Maximum [Member] |  |  |  |  |
Lease Obligations [Line Items] |  |  |  |  |
Term of Lease |  | 15 years |  |  |

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- Definition Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year, net of sublease income maturing in the next fiscal year. + References No definition available. + Details
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- Definition Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year, net of sublease income maturing in the fourth fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year, net of sublease income maturing in the third fiscal year following the latest fiscal year. + References No definition available. + Details
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X
- Definition Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year, net of sublease income maturing in the second fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueInYearTwo
Namespace Prefix: | vsec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year, net of sublease income maturing after the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueThereafter
Namespace Prefix: | vsec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year, net of sublease income having an initial or remaining non-cancelable letter-terms in excess of one year. + References No definition available. + Details
Name: | vsec_OperatingLeasesFutureMinimumPaymentsNetCommitmentsDueTotal
Namespace Prefix: | vsec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The length of time the entity is under obligation to lease the asset. + References No definition available. + Details
Name: | vsec_TermOfLease
Namespace Prefix: | vsec_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | vsec_LeaseObligationsTypeAxis=us-gaap_CapitalLeaseObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | vsec_LeaseObligationsTypeAxis=vsec_OperatingLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |