Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Adjustment Interval of Variable Rate on Interest Rate Swap	90
Derivative asset	$ 2.6		$ 0.3
Interest income (expense) related to the ineffectiveness associated with the fair value hedge	2.3	0.5
Interest rate swap agreement for notional amount	100.0
July 2013 Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap agreement for notional amount	$ 100.0