Earnings Per Share and Shareholders' Equity Transactions (Information Regarding Basic and Diluted Earnings Per Share) (Details) - $ / shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Basic shares used in the calculation of earnings per share	35.6	35.7	35.6	36.0
Diluted shares used in the calculation of earnings per share	36.1	36.3	36.1	36.6
Per share effect of dilutive securities on income from continuing operations		$ (0.02)	$ (0.06)	$ (0.10)
Per share effect of dilutive securities on net income		$ (0.01)	$ (0.06)	$ (0.11)
Employee Stock Options [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive effect of securities	0.2	0.3	0.3	0.3
Non-Vested Stock Grants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive effect of securities	0.3	0.3	0.2	0.3