Employee Benefits - (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Postemployment Benefits [Abstract]
Employee 401(K) profit sharing plan, maximum annual matching per employee	6.00%
Employee 401(K) profit sharing plan, employer matching contribution	50.00%
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$ 2.3	$ 2.4	$ 2.8
Europe [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$ 0.2	$ 0.1	$ 0.1