Compensation Employee Long Term Incentive Plan (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested at December 31, 2017, Weighted Average Grant Date Fair Value	$ 10.20
Granted, Weighted Average Grant Date Fair Value	11.00
Vested, Weighted Average Grant Date Fair Value	10.20
Forfeitured, Weighted Average Grant Date Fair Value	10.38
Nonvested at December 31, 2018, Weighted Average Grant Date Fair Value	$ 10.60	$ 10.20
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	$ 10.4	$ 3.4
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 9.0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 4 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 15.4
Deferred Compensation Cash-based Arrangements, Liability, Current and Noncurrent	8.7
Defined contribution plan, employer 401K contribution amounts	$ 1.0	$ 0.2
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at December 31, 2017	18
Granted	811
Vested	(5)
Forfeited	(16)
Nonvested at December 31, 2018	808	18
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at December 31, 2017	0
Granted	199
Vested	0
Forfeited	0
Nonvested at December 31, 2018	199	0
Phantom Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at December 31, 2017	2,446
Granted	0
Vested	(1,394)
Forfeited	(54)
Nonvested at December 31, 2018	998	2,446