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Income Taxes - Carryforwards (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Operating loss carryforwards |  |
Valuation allowance against deferred tax assets | $ 17.2 | $ 17.3
UK |  |
Operating loss carryforwards |  |
Amount of tax credit carryforwards not subject to expiration | 4.7 |
Valuation allowance against deferred tax assets | 6.5 |
German |  |
Operating loss carryforwards |  |
Net operating loss carryforwards not subject to expiration | 20.1 |
Valuation allowance against net operating loss carryforwards | 7.3 |
Australia |  |
Operating loss carryforwards |  |
Net operating loss carryforwards not subject to expiration | 22.1 |
Australia | Capital loss carryforwards |  |
Operating loss carryforwards |  |
Valuation allowance against tax credit carryforwards | 0.1 |
Italian |  |
Operating loss carryforwards |  |
Net operating loss carryforwards not subject to expiration | 0.1 |
Canada |  |
Operating loss carryforwards |  |
Net operating loss carryforwards not subject to expiration | 1.7 |
Valuation allowance against net operating loss carryforwards | 0.4 |
State |  |
Operating loss carryforwards |  |
Net operating loss carryforwards that expire at various dates | 240.1 |
Net operating loss carryforwards utilized | 174.2 |
Valuation allowance against net operating loss carryforwards | 2.6 |
Valuation allowance against tax credit carryforwards | 0.3 |
Federal and state |  |
Operating loss carryforwards |  |
Amount of tax credit carryforwards not subject to expiration | $ 8.5 |

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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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