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Income Taxes - Summary of Federal Net Operating Loss Carryforwards and Related Deferred Income Tax Aseets (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Net Operating Loss Carryforwards | $ 53.3 | $ 100.7
Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Net Operating Loss Carryforwards | 152.3 |
Deferred Tax Assets, Net Operating Loss Carryforwards | 53.3 | 94.4
State and Local Jurisdiction [Member] |  |
Income Tax Contingency [Line Items] |  |
Deferred Tax Assets, Net Operating Loss Carryforwards |  | 6.3
2017 through 2020 [Member] | Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Net Operating Loss Carryforwards | 19.0 |
Deferred Tax Assets, Net Operating Loss Carryforwards | 6.7 |
2021 through 2025 [Member] | Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Net Operating Loss Carryforwards | 32.9 |
Deferred Tax Assets, Net Operating Loss Carryforwards | 11.5 |
2026 through 2030 [Member] | Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Net Operating Loss Carryforwards | 30.0 |
Deferred Tax Assets, Net Operating Loss Carryforwards | 10.5 |
2031 through 2032 [Member] | Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Net Operating Loss Carryforwards | 70.4 |
Deferred Tax Assets, Net Operating Loss Carryforwards | $ 24.6 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating 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=6907707&loc=d3e32621-109319 Reference 2: 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=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + 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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