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Income Taxes NOL and credit carryovers (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | $ 32.8 |
Federal NOL carryover | 87.1 |
Federal NOL carryover valuation allowance | (32.1) |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 22.8 |
Valuation Allowance, Amount | (37.9) | $ (56.1)
Deferred Tax Assets, Operating Loss Carryforwards | 83.4 | $ 137.3
Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Capital Loss Carryforwards | 7.1 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Capital Loss Carryforwards | 0.1 |
Operating Loss Carryforwards, Valuation Allowance | (8.4) |
Secretariat of the Federal Revenue Bureau of Brazil [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | 0.5 |
Operating Loss Carryforwards, Valuation Allowance | (0.5) |
Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Federal NOL carryover valuation allowance | (3.0) |
Deferred Tax Assets, Operating Loss Carryforwards | 52.9 |
Deferred Tax Assets, Tax Credit Carryforwards | 3.0 |
Operating Loss Carryforwards, Valuation Allowance | (12.5) |
UNITED STATES |  |
Operating Loss Carryforwards [Line Items] |  |
Federal NOL carryover valuation allowance | 0.0 |
Deferred Tax Assets, Tax Credit Carryforwards | 18.1 |
Operating Loss Carryforwards, Valuation Allowance | 0.0 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Federal NOL carryover valuation allowance | (0.5) |
Deferred Tax Assets, Tax Credit Carryforwards | 0.7 |
Capital Loss Carryforward [Member] | Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Valuation Allowance, Amount | (7.1) |
Capital Loss Carryforward [Member] | State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Valuation Allowance, Amount | $ (0.1) |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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