Stock-Based Compensation - Schedule of Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	1 year 10 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	1 year 10 days
Stock option awards granted	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	$ 0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding options, beginning of year, number of shares	428,176
Exercised, number of shares	(191,193)
Forfeited, number of shares	(15,786)
Outstanding options, end of year, number of shares	221,197	428,176
Outstanding options exercisable, end of year, number of shares	221,197
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding options, beginning of year, weighted average exercise price (in dollars per share)	$ 15.61
Exercised, weighted average exercise price (in dollars per share)	15.76
Forfeited, weighted average exercise price (in dollars per share)	17.05
Outstanding options, end of year, weighted average exercise price (in dollars per share)	15.33	$ 15.61
Outstanding options exercisable, end of year, weighted average exercise price (in dollars per share)	$ 15.33
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of options exercised	$ 4.9	$ 4.9	$ 6.3
Proceeds from Stock Options Exercised	1.0	1.8	2.4
Common Stock Redeemed For Payment of Stock Option Exercises, Aggregate Value	$ 2.0	$ 1.6	$ 2.8