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Interim Financial Statements - Additional Information (Detail) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) Segment ManufacturingPlants | Sep. 30, 2015 USD ($)
Interim Reporting [Line Items] |  |  |  |
Number of manufacturing plants | ManufacturingPlants |  |  | 41 |
Number of reportable segments | Segment |  |  | 3 |
Share based compensation expense |  |  | $ 3,560 | $ 2,919
Forward Starting Interest Rate Swap Contract [Member] | Restated [Member] |  |  |  |
Interim Reporting [Line Items] |  |  |  |
Other comprehensive income, tax | $ 500 |  |  |
Selling, General and Administrative Expense [Member] |  |  |  |
Interim Reporting [Line Items] |  |  |  |
Share based compensation expense | $ 900 | $ 1,100 | 3,600 | $ 2,900
Selling, General and Administrative Expense [Member] | Executive Officer [Member] |  |  |  |
Interim Reporting [Line Items] |  |  |  |
Share based compensation expense |  |  | $ 400 |

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