Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Operating loss carryforward expiration year	2018 to 2035
Increase in valuation allowance	$ 15.9	$ 11.6	$ 10.2
U.S
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	197.8
Non us
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 0.2