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Fair Value Measurements (Details) - USD ($) $ in Millions | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Foreign Currency Transaction Gain, before Tax | $ (0.1) |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 4.5 |  |  | $ 3.7
Assets, Fair Value Disclosure [Abstract] |  |  |  |
Business Combination, Contingent Consideration, Liability | $ 3.8 |  |  | $ 3.8
Fair Value, Measurements, Recurring [Member] |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |
Available for sale securities |  | $ 4.6 | $ 4.6 |
Trading securities |  | 2.4 | 2.3 |
Business Combination, Contingent Consideration, Liability |  | 0.2 | 0.2 |
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |
Available for sale securities |  | 0.0 | 0.0 |
Trading securities |  | 2.4 | 2.3 |
Business Combination, Contingent Consideration, Liability |  | 0.0 | 0.0 |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |
Available for sale securities |  | 0.0 | 0.0 |
Trading securities |  | 0.0 | 0.0 |
Business Combination, Contingent Consideration, Liability |  | 0.0 | 0.0 |
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |  |
Assets, Fair Value Disclosure [Abstract] |  |  |  |
Available for sale securities |  | 4.6 | 4.6 |
Trading securities |  | 0.0 | 0.0 |
Business Combination, Contingent Consideration, Liability |  | 0.2 | 0.2 |
Senior Secured Notes Maturing 2017 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Notes Payable, Fair Value Disclosure |  | $ 375.0 | $ 371.0 |

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