Discontinued Operations - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operation		$ 12.2
Waterloo [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operation	$ 14.0
Gain on disposal of discontinued operations	$ 7.0
Discontinued operation beginning period	Jan. 01, 2015
Pre-tax loss on sale of discontinued operations	$ 16.9
Transaction and other sale-related costs of discontinued operation	2.8
Estimated tax effect on sale of discontinued operation	$ 26.5

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount of tax expense (benefit) on gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount of other expense attributable to disposal group, including, but not limited to, discontinued operation.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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