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Related Parties (Details) (Director [Member], USD $) In Millions, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Related Party Transaction [Line Items] |  |
Related Party Transaction Amount of Assets Under Management in Defined Benefit Plans | $ 136.0 |
Amounts Invested in Defined Contribution Plan Mutual Fund Managed by a Directors Investment Advisory Firm | 21.3 |
Amounts Invested in Defined Contribution Plan Mutual Fund Managed by a Directors Investment Advisory Firm Percentage of Total Defined Contribution Plan Investments | 6.40% |
Trinity [Member] |  |
Related Party Transaction [Line Items] |  |
Related Party Transaction, Amounts of Transaction | 143.2 |
Related Party Transaction, Expenses from Transactions with Related Party | 0.3 | 0.2
Pension Plan, Defined Benefit [Member] |  |
Related Party Transaction [Line Items] |  |
Related Party Transaction, Expenses from Transactions with Related Party | $ 0.2 | $ 0.2

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- Definition Amounts Invested in Defined Contribution Plan Mutual Fund Managed by a Director's Investment Advisory Firm + References No definition available. + Details
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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 Investment Assets Managed by a Directors Investment Advisory Firm + References No definition available. + Details
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- Definition Related Party Transaction Amount of Assets Under Management in Defined Benefit Plans + 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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