v3.3.1.900

Income Taxes - Schedule of Tax Credits That Expire Over Varying Amounts and Periods (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($)
U.S. State [Member] |
Tax Credit Carryforward [Line Items] |
Tax credit Carryover | $ 19.3
Canada [Member] | Foreign [Member] |
Tax Credit Carryforward [Line Items] |
Tax credit Carryover | $ 9.0
Minimum [Member] | Canada [Member] | Foreign [Member] |
Tax Credit Carryforward [Line Items] |
Tax credit carryovers year of expiration | 2016
Maximum [Member] | Canada [Member] | Foreign [Member] |
Tax Credit Carryforward [Line Items] |
Tax credit carryovers year of expiration | 2033

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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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