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Derivative Financial Instruments and Hedging Activities - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Unrealized gain (loss) on derivatives arising during period, before tax | $ 1.9 | $ 9.2
Other comprehensive income (loss), tax | 0.1 | $ 0.5
Projected amortization of unrealized losses from AOCL to earnings, coming twelve months | $ 0.3 |

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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References No definition available. + Details
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