Debt - Additional Information (Details)
12 Months Ended
Sep. 26, 2014
USD ($)
Sep. 17, 2014
USD ($)
Dec. 31, 2016
USD ($)
letters_of_credit
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Apr. 01, 2016
Sep. 25, 2015
Debt Instrument [Line Items]              
Distribution to subsidiary of Exelis     $ 0 $ 0 $ 136,281,000    
Debt financing fees     1,408,000 2,385,000      
Amortization expense     $ 1,198,000 $ 1,130,000 $ 185,000    
Letters of credit              
Debt Instrument [Line Items]              
Credit facility, maximum borrowing capacity   $ 35,000,000          
Number of letters of credit outstanding | letters_of_credit     8        
Letters of credit outstanding     $ 12,300,000        
Swingline              
Debt Instrument [Line Items]              
Credit facility, maximum borrowing capacity   10,000,000          
Senior secured credit facilities              
Debt Instrument [Line Items]              
Credit facility, maximum borrowing capacity   $ 215,000,000          
Maximum allowed dividend distribution     $ 12,859,794        
Covenant terms, ratio of total indebtedness to combined EBITDA     3.25     2.75 3.00
Covenant terms, ratio of combined EBITDA to combined interest expense     4.50        
Ratio of total indebtedness to combined EBITDA     1.63        
Ratio of combined EBITDA to combined interest expense     9.09        
Interest rate     3.52%        
Senior secured credit facilities | Minimum              
Debt Instrument [Line Items]              
Undrawn portion of revolving facility, commitment fee percentage     0.40%        
Senior secured credit facilities | Maximum              
Debt Instrument [Line Items]              
Undrawn portion of revolving facility, commitment fee percentage     0.50%        
Senior secured credit facilities | London Interbank Offered Rate (LIBOR) | Minimum              
Debt Instrument [Line Items]              
Spread on variable rate     2.50%        
Senior secured credit facilities | London Interbank Offered Rate (LIBOR) | Maximum              
Debt Instrument [Line Items]              
Spread on variable rate     3.00%        
Term facility              
Debt Instrument [Line Items]              
Term facility, amortization rate, year one   7.50%          
Term facility, amortization rate, year two   10.00%          
Term facility, amortization rate, year three   10.00%          
Term facility, amortization rate, year four   15.00%          
Term facility, amortization rate, year five   57.50%          
Balance outstanding under term loan facility   $ 85,000,000          
Term facility, mandatory prepayment terms, percentage of net cash proceeds from incurrence of indebtedness       100.00%      
Term facility, mandatory prepayment terms, percentage of borrower's excess cash flow       50.00%      
Term facility, mandatory prepayment terms, percentage of borrower's excess cash flow, stepdown to 25%       25.00%      
Term facility, mandatory prepayment terms, percentage of borrower's excess cash flow, stepdown to 0%       0.00%      
Term facility | Line of Credit              
Debt Instrument [Line Items]              
Credit facility, maximum borrowing capacity   $ 140,000,000          
Debt instrument, term   5 years          
Distribution to subsidiary of Exelis $ 136,300,000            
Debt financing fees $ 3,700,000            
Amortization expense     $ 1,200,000 $ 1,100,000      
Repayments of term facility     15,000,000        
Revolver | Line of Credit              
Debt Instrument [Line Items]              
Credit facility, maximum borrowing capacity   $ 75,000,000          
Debt instrument, term   5 years          
Available borrowing capacity     $ 62,700,000