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Quarterly Results of Operations - Additional Information (Detail) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2015 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule Of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Workforce reduction, recognized aggregate charge |  |  |  |  |  | $ 0.2 | $ 0.4 | $ 21.1 |  |  | $ 21.7 |
Pre-tax impairment charge to write down |  |  |  |  |  |  | 12.0 |  |  |  |  |
Valuation allowance |  |  |  |  |  |  |  |  |  | $ (2.2) | 159.0 |
Income tax expense related to increase in reserve for uncertain tax positions |  | $ 2.4 |  |  |  |  |  |  |  | 2.4 | $ 0.7 | $ (5.1)
US-Canada APA |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
U.S.-Canada APA |  | 2.2 | $ (5.6) |  |  |  |  |  |  | $ (3.4) |  |
Other Operating Income (Expense), Net |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Income received from settlement of business interruption insurance claim |  | 0.9 |  | $ 1.4 | $ 2.0 |  |  |  | $ 3.4 |  |  |
Germany and Belgian |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Valuation allowance | $ 150.3 | $ (4.3) | $ (0.8) | $ 2.9 |  | $ 6.4 | $ 2.3 | $ 150.3 |  |  |  |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e32123-109318 + Details
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