Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Aug. 20, 2021
Share Repurchases [Abstract]
Number of Shares Authorized to be Repurchased	6,600
Additional Shares Authorized to be Repurchased				3,000
Treasury Stock, Shares, Acquired	0	0	1,800
Payments of Dividends	$ 6.3	$ 6.3	$ 45.9
Special Dividend			39.5
Regular Dividend	$ 6.3	$ 6.3	$ 6.4