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Income Taxes NOL and credit carryovers (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | $ 32.8 |
Federal NOL carryover | 158.3 |
Federal NOL carryover valuation allowance | (48.6) |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 32.2 |
Valuation Allowance, Amount | (56.1) | $ (32.3)
Deferred Tax Assets, Operating Loss Carryforwards | 137.3 | $ 134.0
Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Capital Loss Carryforwards | 6.9 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Capital Loss Carryforwards | 0.6 |
Operating Loss Carryforwards, Valuation Allowance | (13.1) |
Secretariat of the Federal Revenue Bureau of Brazil [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | 1.0 |
Operating Loss Carryforwards, Valuation Allowance | (0.7) |
Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Federal NOL carryover valuation allowance | (2.1) |
Deferred Tax Assets, Operating Loss Carryforwards | 63.8 |
Deferred Tax Assets, Tax Credit Carryforwards | 2.1 |
Operating Loss Carryforwards, Valuation Allowance | (24.6) |
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 | (0.6) |
Deferred Tax Assets, Tax Credit Carryforwards | 0.8 |
Capital Loss Carryforward [Member] | Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Valuation Allowance, Amount | (6.9) |
Capital Loss Carryforward [Member] | State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Valuation Allowance, Amount | $ (0.6) |

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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=6907707&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=51675352&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=6907707&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=51675352&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=6907707&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=6907707&loc=d3e32632-109319 + Details
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