Derivative Instruments and Hedging Activities (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Not Designated as Hedging Instrument [Member]	Jun. 30, 2013 Not Designated as Hedging Instrument [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount outstanding			$ 9.2		$ 12.6	$ 9.2	$ 21.9
Losses recognized on de-designated derivative contracts			0.2	(5.8)
Gains included in other comprehensive income for de-designated derivative contracts			0.1	0.5
Losses in AOCI to be reclassified in 12 months	0.4
Cash collateral on our hedges	$ 0.8	$ 0.8