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Debt (Details) (USD $)
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3 Months Ended | ||
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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| Long-term Debt, Fiscal Year Maturity [Abstract] | |||
| Debt outstanding | 244,800,000us-gaap_LongTermDebt | $ 48,600,000us-gaap_LongTermDebt | |
| LIBOR [Member] | |||
| Long-term Debt, Fiscal Year Maturity [Abstract] | |||
| Base margin (in hundredths) |
2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |
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| Base Rate [Member] | |||
| Long-term Debt, Fiscal Year Maturity [Abstract] | |||
| Base margin (in hundredths) |
1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
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| Amended and Restated [Member] | |||
| Debt Instrument [Line Items] | |||
| Maturity date | Jan. 28, 2020 | ||
| Financing costs |
2,000,000us-gaap_UnamortizedDebtIssuanceExpense / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
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| Amortization period of debt issuance costs | 5 years | ||
| Long-term Debt, Fiscal Year Maturity [Abstract] | |||
| Revolving loans potential increment in maximum borrowing capacity |
75,000,000vsec_RevolvingLoansPotentialIncrementInMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
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| Duration of interest rate cash flow hedge | 3 years | ||
| Interest rate range, minimum (in hundredths) |
2.43%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
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| Interest rate range, maximum (in hundredths) |
4.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
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| Effective interest rate (in hundredths) |
2.97%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
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| Interest expense, net |
1,700,000us-gaap_InterestExpense / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
692,000us-gaap_InterestExpense / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
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| Amended and Restated [Member] | Swap [Member] | |||
| Long-term Debt, Fiscal Year Maturity [Abstract] | |||
| Derivative notional amount |
125,000,000invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_LongtermDebtTypeAxis = vsec_AmendedAndRestatedMember |
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| Term loan Facility [Member] | |||
| Long-term Debt, Fiscal Year Maturity [Abstract] | |||
| Term loan payments 2015 |
11,200,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear / us-gaap_LongtermDebtTypeAxis = vsec_TermLoanFacilityMember |
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| Term loan payments 2016 |
17,800,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_LongtermDebtTypeAxis = vsec_TermLoanFacilityMember |
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| Term loan payments 2017 |
21,600,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_LongtermDebtTypeAxis = vsec_TermLoanFacilityMember |
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| Term loan payments 2018 |
28,100,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_LongtermDebtTypeAxis = vsec_TermLoanFacilityMember |
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| Term loan payments 2019 |
30,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_LongtermDebtTypeAxis = vsec_TermLoanFacilityMember |
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| Term loan payments after 2019 |
41,300,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive / us-gaap_LongtermDebtTypeAxis = vsec_TermLoanFacilityMember |
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| Borrowings outstanding |
150,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = vsec_TermLoanFacilityMember |
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| Revolving Loan Facility [Member] | |||
| Long-term Debt, Fiscal Year Maturity [Abstract] | |||
| Revolving loans maximum borrowing capacity |
150,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
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| Revolving loans amount outstanding |
94,800,000us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
23,600,000us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
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| Letters of credit outstanding |
0us-gaap_LettersOfCreditOutstandingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
$ 0us-gaap_LettersOfCreditOutstandingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
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- Definition
Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage points added to the reference rate to compute the variable rate on the debt instrument. No definition available.
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- Definition
Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Maximum contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Minimum contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. No definition available.
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- Definition
Amount borrowed under the credit facility as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the remainder of the fiscal year following the latest fiscal year ended. No definition available.
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- Definition
Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Represents the time period in which debt issuance costs are amortized. No definition available.
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- Definition
Potential increment in maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. No definition available.
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