Risk Management (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Trading Activity, Gains and Losses, Net [Line Items]
Foreign currency exchange rate, Mexican peso to U.S. dollar, percentage change in period	17.00%
Foreign Currency Transaction Gain (Loss), before Tax	$ 1.2	$ (1.0)	$ 0.2