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Income Taxes (Details) $ / shares in Units, $ in Millions, ₩ in Billions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2016 USD ($) $ / shares | Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2017 KRW (₩) | Jun. 30, 2016 USD ($) $ / shares
United States | $ (4.8) | $ (20.8) | $ (18.5) |  | $ (25.5)
Foreign | 39.6 | 57.6 | 89.4 |  | 117.2
Income before income taxes | 34.9 | 36.9 | 70.9 |  | 91.6
Income tax provision | $ 4.6 | $ 7.1 | $ 9.6 |  | $ 10.3
Effective income tax rate (as a percent) | 13.20% | 19.40% | 13.50% | 13.50% | 11.20%
Income tax benefit (expense) due to change in estimate related to uncertain tax position and adjustment for ASU 2016-09 |  |  | $ (3.9) |  |
Income tax benefit due to change in estimate related to uncertain tax position | $ (2.7) |  |  |  |
Special income tax concession period |  |  | 5 years | 5 years |
Decrease in foreign income taxes due to special income tax concession | $ 0.5 | $ 1.2 | $ 1.3 |  | $ 1.8
Impact of income tax concession on basic earnings per common share (in dollars per share) | $ / shares | $ 0.01 | $ 0.02 | $ 0.02 |  | $ 0.03
Impact of income tax concession on diluted earnings per common share (in dollars per share) | $ / shares | $ 0.01 | $ 0.02 | $ 0.02 |  | $ 0.03
Tax Authority, South Korea (SRTO) |  |  |  |  |
Income tax assessment notice, amount |  |  | $ 8.2 | ₩ 9.2 |
Without income tax benefit adjustment |  |  |  |  |
Effective income tax rate (as a percent) | 5.40% |  | 8.10% | 8.10% |

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- Definition Represents the impact of special tax concession on diluted earnings per share. + References No definition available. + Details
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- Definition Represents the impact of special tax concession on basic earnings per share. + References No definition available. + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The amount of estimated penalties recognized in the period arising from income tax examinations. + 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=84230637&loc=d3e32718-109319 + Details
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