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