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Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	Aug. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted				89,225
Income tax benefit		$ 0.2	$ 0.4	$ 0.6	$ 0.9
Treasury Stock, Shares, Acquired		150,000		405,000
Treasury Stock Acquired, Average Cost Per Share	$ 33.14			$ 38.04
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 0.5	1.6	$ 1.9	3.4
Share-based Payment Arrangement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		0.6	1.7	2.2	3.7
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		0.1	0.1	0.3	0.3
Total Shareholder Return [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		0.5	0.8	1.8	2.3
Performance Units Related to Earnings Per Share [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 0.0	$ 0.8	$ 0.1	$ 1.1