Acquisitions, Textuals (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				24 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Alexco	Dec. 31, 2011 Alexco	Jan. 03, 2011 Alexco
Business Acquisition
Net cash consideration paid	$ 0	$ 0	$ 83.2	$ 83.2
Liabilities assumed from acquisition				1.0
Acquisition related costs				$ 0.1	$ 0.5
Period for goodwill expected to be deductible for income tax purposes						15 years