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Related Parties (Details) - FS&C [Member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Related Party Transaction [Line Items] |  |  |
Related Party Transaction Amount of Assets in Defined Contributions Plans |  |  | $ 22.8
Related Party Transaction Percent of Assets in Defined Contribution Plan Assets |  |  | 6.00%
Trinity [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Amounts of Assets Managed by Investment Advisory Firm under Director's Management |  | $ 85.8 | $ 154.7
Related Party Transaction, Expenses from Transactions with Related Party | $ 0.1 | 0.3 | 0.4
Pension Plans, Defined Benefit [Member] | Investment Management Services for Defined Benefit Plan [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Related Party Transaction, Expenses from Transactions with Related Party | 0.4 | 0.4 | 0.3
Assets under Management, Carrying Amount | $ 137.2 | $ 159.2 | $ 148.6

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- Definition Amounts Invested in Defined Contribution Plan Mutual Fund Managed by a Director's Investment Advisory Frim, Percentage of Total Defined Contribution Plan Investments + References No definition available. + Details
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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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- Details
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