Income Taxes - Net Operating Losses (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
2016-2020	$ 3.1
2021-2025	12.8
2026 and thereafter	13.1
No expiration	8.1
Tax benefit of net operating loss carryforwards before valuation allowances	37.1	$ 47.4
Federal
Operating Loss Carryforwards [Line Items]
2016-2020	0.0
2021-2025	0.0
2026 and thereafter	0.0
No expiration	0.0
Tax benefit of net operating loss carryforwards before valuation allowances	0.0
State
Operating Loss Carryforwards [Line Items]
2016-2020	0.1
2021-2025	0.3
2026 and thereafter	12.3
No expiration	0.0
Tax benefit of net operating loss carryforwards before valuation allowances	12.7
Foreign
Operating Loss Carryforwards [Line Items]
2016-2020	3.0
2021-2025	12.5
2026 and thereafter	0.8
No expiration	8.1
Tax benefit of net operating loss carryforwards before valuation allowances	$ 24.4