Annual report pursuant to Section 13 and 15(d)

Nature of Business and Significant Accounting Policies (Details)

v3.3.1.900
Nature of Business and Significant Accounting Policies (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
shares
Sep. 30, 2015
shares
Jun. 30, 2015
shares
Mar. 31, 2015
shares
Dec. 31, 2014
shares
Sep. 30, 2014
shares
Jun. 30, 2014
shares
Mar. 31, 2014
shares
Dec. 31, 2015
USD ($)
TradeName
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]                      
Basic weighted average common shares outstanding (in shares) 5,375,000 5,375,000 5,375,000 5,370,000 5,356,000 5,356,000 5,356,000 5,347,000 5,373,613 5,353,912 5,329,208
Effect of dilutive shares (in shares)                 20,022 17,288 14,059
Diluted weighted average shares outstanding (in shares) 5,407,000 5,396,000 5,391,000 5,380,000 5,380,000 5,372,000 5,368,000 5,364,000 5,393,635 5,371,200 5,343,267
Concentration of Credit Risk [Abstract]                      
Percentage of contracts with the government                 76.00% 99.00% 99.00%
Deferred Compensation Plans [Abstract]                      
Deferred compensation plan expense | $                 $ 1.9 $ 1.3 $ 1.4
Intangibles [Abstract]                      
Impairment of intangible assets | $                 $ 0.0 $ 0.0 $ 0.0
Finite-Lived Intangible Assets [Line Items]                      
Amortization finite-lived intangible assets weighted average                 12 years 2 months 12 days    
Equipment [Member] | Minimum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 3 years    
Equipment [Member] | Maximum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 15 years    
Buildings and Land Improvements [Member] | Minimum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 15 years    
Buildings and Land Improvements [Member] | Maximum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 20 years    
Contract-related [Member]                      
Finite-Lived Intangible Assets [Line Items]                      
Amortization finite-lived intangible assets weighted average                 12 years 7 months 6 days    
Contract-related [Member] | Minimum [Member]                      
Finite-Lived Intangible Assets [Line Items]                      
Useful life of intangible assets                 7 years    
Contract-related [Member] | Maximum [Member]                      
Finite-Lived Intangible Assets [Line Items]                      
Useful life of intangible assets                 16 years    
Trade Name [Member]                      
Finite-Lived Intangible Assets [Line Items]                      
Useful life of intangible assets                 9 years    
Number of trade names | TradeName                 4    
Acquired Technologies [Member]                      
Finite-Lived Intangible Assets [Line Items]                      
Useful life of intangible assets                 11 years