Income Taxes - Net Operating Losses (Details) - USD ($) $ in Millions |
Dec. 31, 2017 |
Dec. 31, 2016 |
---|---|---|
Operating Loss Carryforwards [Line Items] | ||
2018-2022 | $ 6.2 | |
2023-2027 | 4.9 | |
2028 and thereafter | 16.9 | |
Unlimited | 13.1 | |
Tax benefit of net operating loss carryforwards before valuation allowances | 41.1 | $ 42.4 |
Federal | ||
Operating Loss Carryforwards [Line Items] | ||
2018-2022 | 0.0 | |
2023-2027 | 0.0 | |
2028 and thereafter | 0.0 | |
Unlimited | 0.0 | |
Tax benefit of net operating loss carryforwards before valuation allowances | 0.0 | |
State | ||
Operating Loss Carryforwards [Line Items] | ||
2018-2022 | 0.1 | |
2023-2027 | 0.6 | |
2028 and thereafter | 15.8 | |
Unlimited | 0.0 | |
Tax benefit of net operating loss carryforwards before valuation allowances | 16.5 | |
Foreign | ||
Operating Loss Carryforwards [Line Items] | ||
2018-2022 | 6.1 | |
2023-2027 | 4.3 | |
2028 and thereafter | 1.1 | |
Unlimited | 13.1 | |
Tax benefit of net operating loss carryforwards before valuation allowances | $ 24.6 |