Income Taxes (Valuation Allowance) (Details) € in Millions, $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2015 EUR (€)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Apr. 30, 2014 USD ($)	Apr. 30, 2014 EUR (€)
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Valuation Allowance				$ 0.9
Increase to income tax expense due to losses in states from which the Company did not benefit from			$ 0.1
Intangible Deferred Tax Asset [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Valuation Allowance					$ 4.4	€ 3.2
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 3.3	€ 3.2