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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision (benefit) for income taxes | $ (1,212,000) | $ (2,214,000) | $ 1,700,000 | $ 1,179,000 | $ 29,535,000 | $ (3,524,000) | $ (10,096,000) | $ (6,943,000) | $ 75,000 | $ 1,113,000 | $ 694,000 | $ 3,559,000 | $ (547,000) | $ 8,972,000 | $ 5,441,000
Effective Income Tax Rate, Continuing Operations |  |  |  |  |  |  |  |  |  |  |  |  | 1.40% | (1.40%) | 31.30%
Difference between effective tax rate and federal statutory rate |  |  |  |  |  |  |  |  |  |  |  |  | 33.60% | 36.40% | 3.70%
Valuation allowance | 109,913,000 |  |  |  | 107,312,000 |  |  |  | $ 0 |  |  |  | $ 109,913,000 | $ 107,312,000 | $ 0
Deferred income tax assets | 29,398,000 |  |  |  | 16,796,000 |  |  |  |  |  |  |  | 29,398,000 | 16,796,000 |
Net operating loss carryforwards | 148,199,000 |  |  |  | 85,609,000 |  |  |  |  |  |  |  | 148,199,000 | 85,609,000 |
Loss carryforwards for U.S. federal income tax purposes | 50,587,000 |  |  |  | 33,606,000 |  |  |  |  |  |  |  | 50,587,000 | 33,606,000 |
Loss carryforwards for U.S. state income tax purposes | 78,274,000 |  |  |  | 34,492,000 |  |  |  |  |  |  |  | 78,274,000 | 34,492,000 |
Loss carryforwards for foreign income tax purposes | 19,338,000 |  |  |  | 17,511,000 |  |  |  |  |  |  |  | 19,338,000 | 17,511,000 |
Decrease in valuation allowance |  |  |  |  |  |  |  |  |  |  |  |  | 17,849,000 |  |
Unremitted earnings of foreign subsidiaries | 38,545,000 |  |  |  |  |  |  |  |  |  |  |  | 38,545,000 |  |
Unrecognized benefits |  |  |  |  |  |  |  |  |  |  |  |  | 10,077,000 | 6,451,000 |
Anticipated additional unrecognized tax benefits during the next twelve months |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |
Australia Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2012 |  |
Belgium Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2013 |  |
Brazil Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
China Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2013 |  |
France Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2013 |  |
German Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2012 |  |
India Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2013 |  |
Israel Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2012 |  |
Italy Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
Japan Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
Korea Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
Mexican Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
Netherlands Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
Switzerland Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
United Kingdom Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2015 |  |
Uruguay Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax years subject to examination |  |  |  |  |  |  |  |  |  |  |  |  | 2011 |  |
U.S Federal Income Tax [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and experimentation tax credit carryforwards | 2,544,000 |  |  |  | 2,544,000 |  |  |  |  |  |  |  | $ 2,544,000 | 2,544,000 |
Foreign tax credits | 7,155,000 |  |  |  | 2,740,000 |  |  |  |  |  |  |  | 7,155,000 | 2,740,000 |
Other tax credits | 474,000 |  |  |  | 474,000 |  |  |  |  |  |  |  | $ 474,000 | 474,000 |
U.S Federal Income Tax [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net operating loss carryforwards beginning expiration date |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2022 |  |
U.S. State Income Tax [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and experimentation tax credit carryforwards | 2,649,000 |  |  |  | 2,082,000 |  |  |  |  |  |  |  | $ 2,649,000 | 2,082,000 |
Other tax credits | 600,000 |  |  |  | 615,000 |  |  |  |  |  |  |  | $ 600,000 | 615,000 |
U.S. State Income Tax [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net operating loss carryforwards beginning expiration date |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2017 |  |
Foreign Income Tax [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and experimentation tax credit carryforwards | $ 149,000 |  |  |  | $ 155,000 |  |  |  |  |  |  |  | $ 149,000 | $ 155,000 |
Foreign Income Tax [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net operating loss carryforwards beginning expiration date |  |  |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2018 |  |

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