Other Intangible Assets - Amortization (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Intangible Assets [Line Items]
Amortization of other intangible assets	$ 1.3	$ 0.5	$ 2.7	$ 1.6
Minimum [Member]
Other Intangible Assets [Line Items]
Amortization period			2 years
Maximum [Member]
Other Intangible Assets [Line Items]
Amortization period			20 years