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Share-Based Compensation and Other Compensation Matters (Details 6) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2012
Chief Financial Officer |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Executive transition costs | $ 1.1 us-gaap_DefinedBenefitPlanSpecialTerminationBenefits / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefFinancialOfficerMember |
Former Chief Executive Officer |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Executive transition costs |  | $ 2.2 us-gaap_DefinedBenefitPlanSpecialTerminationBenefits / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember

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- Definition The amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Termination Benefits -URI http://asc.fasb.org/extlink&oid=6526498 + Details
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