Employee Benefit Plans - Components of Net Periodic Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Settlement charge			$ 1.2	$ 0.9
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 0.3	$ 0.5	0.9	1.3
Expected return on plan assets	(0.4)	(0.5)	(1.4)	(1.5)
Amortization of net actuarial loss	0.1	0.2	0.5	0.5
Settlement charge		0.9	1.2	0.9
Total pension expense	$ 1.2	$ 1.1	$ 1.2	$ 1.2