Debt - Additional Information (Detail) - USD ($)
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12 Months Ended |
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Mar. 10, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Working capital facilities | U.S. dollar | Federal Funds Rate |
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| Debt Instrument [Line Items] |
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| Debt instruments, interest rate |
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0.50%
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| Working capital facilities | U.S. dollar | Eurocurrency Rate |
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| Debt Instrument [Line Items] |
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| Debt instruments, interest rate |
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1.00%
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| Working capital facilities | Canadian Dollars | Eurocurrency Rate |
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| Debt Instrument [Line Items] |
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| Debt instruments, interest rate |
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1.00%
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| Working capital facilities | Debt Instrument Amended And Restated |
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| Debt Instrument [Line Items] |
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| Line of credit facility, accordion feature, increase limit |
$ 200,000,000.0
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| Revolving Credit Agreement |
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| Debt Instrument [Line Items] |
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| Debt instruments, weighted average interest rate |
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3.40%
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2.90%
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| Revolving Credit Agreement | One Month London Interbank Offered Rate (LIBOR) |
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| Debt Instrument [Line Items] |
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| Variable interest rate periods |
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1 month
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| Revolving Credit Agreement | Two Month London Interbank Offered Rate (LIBOR) |
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| Debt Instrument [Line Items] |
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| Variable interest rate periods |
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2 months
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| Revolving Credit Agreement | Three Month London Interbank Offered Rate (LIBOR) |
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| Debt Instrument [Line Items] |
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| Variable interest rate periods |
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3 months
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| Revolving Credit Agreement | Six Month London Interbank Offered Rate (LIBOR) |
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| Debt Instrument [Line Items] |
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| Variable interest rate periods |
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6 months
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| Revolving Credit Agreement | Debt Instrument Amended And Restated |
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| Debt Instrument [Line Items] |
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| Debt instruments, maturity date |
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Dec. 09, 2019
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| Line of credit facility, accordion feature, increase limit |
200,000,000.0
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| Revolving Credit Agreement | Working capital facilities |
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| Debt Instrument [Line Items] |
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| Working capital facilities, borrowing base |
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$ 525,400,000
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$ 542,600,000
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| Letters of credit outstanding |
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31,600,000
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$ 23,600,000
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| Excess availability under credit agreement |
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183,500,000
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| Revolving Credit Agreement | Working capital facilities | Debt Instrument Amended And Restated |
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| Debt Instrument [Line Items] |
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| Debt instruments, borrowing capacity |
1,000,000,000
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| Revolving Credit Agreement | Acquisition facility |
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| Debt Instrument [Line Items] |
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| Excess availability under credit agreement |
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$ 304,600,000
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| Revolving Credit Agreement | Acquisition facility | Debt Instrument Amended And Restated |
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| Debt Instrument [Line Items] |
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| Debt instruments, borrowing capacity |
550,000,000
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| Kildair | Revolving Credit Agreement | Working capital facilities | Debt Instrument Amended And Restated |
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| Debt Instrument [Line Items] |
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| Debt instruments, borrowing capacity |
$ 120,000,000
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