Debt - Additional Information (Details)
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3 Months Ended |
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Apr. 19, 2016
USD ($)
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Sep. 26, 2014
USD ($)
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Mar. 31, 2017
USD ($)
letters_of_credit
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Apr. 01, 2016
USD ($)
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Mar. 30, 2018 |
Dec. 31, 2016
USD ($)
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| Debt Instrument [Line Items] |
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| Debt financing fees |
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$ 1,214,000
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$ 1,408,000
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| Amortization expense |
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$ 194,000
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$ 228,000
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| Letters of credit |
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| Debt Instrument [Line Items] |
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| Credit facility, maximum borrowing capacity |
$ 35,000,000
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| Number of letters of credit outstanding | letters_of_credit |
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7
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| Letters of credit outstanding |
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$ 11,400,000
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| Swingline |
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| Debt Instrument [Line Items] |
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| Credit facility, maximum borrowing capacity |
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 |
$ 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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3.00
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3.25
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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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1.61
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| Ratio of combined EBITDA to combined interest expense |
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9.15
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| Interest rate |
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3.74%
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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 |
7.50%
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| Term facility, amortization rate, year two |
10.00%
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| Term facility, amortization rate, year three |
10.00%
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| Term facility, amortization rate, year four |
15.00%
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| Term facility, amortization rate, year five |
57.50%
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| Balance outstanding under term loan facility |
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$ 81,500,000
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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 |
$ 140,000,000
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| Debt instrument, term |
5 years
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| Distribution to subsidiary of Exelis |
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$ 136,300,000
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| Debt financing fees |
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$ 3,700,000
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| Amortization expense |
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200,000
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$ 200,000
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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 |
$ 75,000,000
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| Debt instrument, term |
5 years
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| Available borrowing capacity |
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$ 63,600,000
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| Forecast | Senior secured credit facilities |
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| Debt Instrument [Line Items] |
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| Covenant terms, ratio of total indebtedness to combined EBITDA |
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2.75
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