Other Intangible Assets - Amortization (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Intangible Assets [Line Items]
Amortization of other intangible assets	$ 1.0	$ 0.5	$ 1.5	$ 1.1
Amortization of deferred financing costs	$ 0.1	$ 0.2	$ 0.1	$ 0.5
Minimum [Member]
Other Intangible Assets [Line Items]
Amortization period			2 years
Maximum [Member]
Other Intangible Assets [Line Items]
Amortization period			20 years