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Income Tax Matters Income Tax Matters Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |  |
Operating Loss Carryforwards | $ 564.4 |  |  |
Excess Tax Benefit From Employee Restricted Stock Resulting In Net Operating Loss Carry forwards | 1.7 |  |  |
Tax Credit Carryforward, Amount | 29.5 |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 2.0 | $ (0.7) | $ 1.2 |
Unrecognized Tax Benefits | 1.7 | 2.2 | 3.8 | $ 15.7
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 0.6 | 1.1 | 2.7 |
Accrued interest and penalties on unrecognized tax benefits | 0.2 | 1.4 |  |
Accrued interest and penalties on unrecognized tax benefits, current | 0.0 | 0.0 |  |
(Decrease) increase in interest and penalty | (1.2) | (0.9) | (5.2) |
Foreign currency impact on gross unrecognized tax benefit (including interest and penalties) which increased (decreased) Other comprehensive income (loss) | $ 0.1 | $ 0.3 | $ 0.7 |

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- Definition The amount the liability recorded for the income tax examination increased or decreased in the current year/accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount of operating loss 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 + Details
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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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