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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Current [Abstract] |  |  |
Federal | $ 14,782 | $ 9,272 | $ 13,217
State | 2,959 | 1,647 | 1,747
Current Total | 17,741 | 10,919 | 14,964
Deferred [Abstract] |  |  |
Federal | (999) | 1,188 | (752)
State | (254) | 95 | 24
Deferred Total | (1,253) | 1,283 | (728)
Provision for income taxes | 16,488 | 12,202 | 14,236
Effective Income Tax Reconciliation [Abstract] |  |  |
Tax at statutory federal income tax rate | 15,348 | 11,343 | 13,212
Increases (decreases) in tax resulting from: [Abstract] |  |  |
State taxes, net of federal tax benefit | 1,901 | 1,233 | 1,331
Permanent differences, net | (77) | 192 | (50)
Other, net | (684) | (566) | (257)
Provision for income taxes | 16,488 | 12,202 | 14,236
Components of Deferred Tax Assets and Liabilities [Abstract] |  |  |
Current deferred tax assets | 767 | 1,355 |
Noncurrent deferred tax assets | 2,099 | 231 |
Net deferred tax assets | 2,866 | 1,586 |
Gross deferred tax assets [Abstract] |  |  |
Deferred compensation and accrued paid leave | 5,947 | 5,125 |
Accrued expenses | 1,533 | 946 |
Stock-based compensation | 386 | 530 |
Interest rate swaps | 456 | 429 |
Reserves for contract disallowances | 328 | 316 |
Acquisition related expenses | 262 | 281 |
Capitalized inventory | 424 | 125 |
vsec_DeferredTaxAssetsImpairmentCharges | 3,445 | 0 |
Other | 61 | 61 |
Total gross deferred tax assets | 12,842 | 7,813 |
Gross deferred tax liabilities [Abstract] |  |  |
Depreciation | (3,288) | (2,563) |
Deferred revenues | (2,746) | (2,113) |
Intangible assets | (3,942) | (1,551) |
Gross deferred tax liabilities | (9,976) | (6,227) |
Net deferred tax assets | $ 2,866 | $ 1,586 |

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