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Income Taxes (Details) - USD ($) $ in Millions | 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, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Increase (decrease) in deferred tax asset valuation allowance |  |  |  |  |  |  |  |  |  | $ 24.4 | $ 16.8 |
Operating Loss Carryforwards | $ 725.8 |  |  |  |  |  |  |  |  | 725.8 |  |
Annual limitation of NOL carryforwards and tax credits generated prior to ownership change |  |  |  |  |  |  |  |  |  | 2.9 |  |
Impairment of excess reorganization value |  |  |  |  |  |  |  |  |  | 0.0 | 137.2 |
Provision (benefit) for income taxes | 0.0 | $ 0.0 | $ 0.0 | $ 0.6 | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.3 |  | 0.6 | 0.3 |
Other Comprehensive Income (Loss), Tax |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 |
Liability for Uncertain Tax Positions, Noncurrent | 0.4 |  |  |  | 1.0 |  |  |  |  | 0.4 | 1.0 | $ 1.3
Unrecognized Tax Benefits, Income Tax Penalties Expense Reduction |  |  |  |  |  |  |  |  |  | (0.4) | (0.2) |
Income Tax Examination, Penalties and Interest Expense Reduction (Increase) |  |  |  |  |  |  |  |  |  | 0.1 | 0.1 |
Income Tax Examination, Penalties and Interest Accrued | 0.1 |  |  |  | $ 0.2 |  |  |  |  | 0.1 | $ 0.2 |
State and Local Jurisdiction [Member] |  |  |  |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards | $ 17.7 |  |  |  |  |  |  |  |  | $ 17.7 |  |
Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized Tax Benefits, Income Tax Penalties Expense Reduction |  |  |  |  |  |  |  |  | $ (0.2) |  |  |

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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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