Goodwill and Intangible Assets, Intangible Assets Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense related to definite-lived intangible assets	$ 1.6	$ 1.6	$ 1.7
Expected amortization of intangible assets for the next five years
Expected amortization of intangible assets for the next year	1.6
2017	1.6
2018	1.6
2019	1.6
2020	1.6
Expected amortization of intangible assets, after 2020	$ 22.5