Goodwill and Other Intangible Assets - Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other Intangible Assets [Line Items]
Amortization of other intangible assets	$ 0.5	$ 0.8
Amortization of deferred financing costs		0.3
Reduction in carrying value of deferred financing costs		$ 1.7
Minimum [Member]
Other Intangible Assets [Line Items]
Amortization period	2 years
Maximum [Member]
Other Intangible Assets [Line Items]
Amortization period	20 years