Income Taxes Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Operating Loss Carryforwards, Valuation Allowance	$ 20.6
Unrecognized tax benefits, ending balance	15.6	$ 15.6
Interest Related to Uncertain Tax Positions	0.7	0.5
Penalties Related to Uncertain Tax Positions	$ 0.6	$ 2.2