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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014
Long-term Debt |  |
Transfers between Levels 1 and 2, description | The Company did not have any transfers between Levels 1 and 2 of financial assets or liabilities that are fair valued on a recurring basis during the three and six months ended June 30, 2015 and 2014. |
Fair Value [Member] | Senior Unsecured Notes [Member] |  |
Long-term Debt |  |
Debt | $ 310.1 | $ 310.3
Carrying Value [Member] | Senior Unsecured Notes [Member] |  |
Long-term Debt |  |
Debt | 298.9 | 298.8
Carrying Value [Member] | Other Long-Term Debt [Member] |  |
Long-term Debt |  |
Debt | $ 593.9 | $ 566.6
Contingent Consideration [Member] | Minimum [Member[ |  |
Long-term Debt |  |
Fair value inputs, discount rate (as a percent) | 14.00% |
Contingent Consideration [Member] | Maximum [Member] |  |
Long-term Debt |  |
Fair value inputs, discount rate (as a percent) | 18.00% |

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