Goodwill and Intangible Assets, Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense related to definite-lived intangible assets	$ 1.7	$ 1.8	$ 2.2
Expected amortization of intangible assets for the next five years
Expected amortization of intangible assets for the next year	1.6
2015	1.6
2016	1.6
2017	1.6
2018	1.6
Expected amortization of intangible assets, year six and thereafter	$ 25.7