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 | |