Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	May 04, 2022	Nov. 06, 2018
Class of Stock [Line Items]
Common stock shares authorized	100,000,000.0		100,000,000.0		100,000,000
Common stock, par value	$ 0.01		$ 0.01		$ 0.01
Preferred stock shares authorized	50,000,000.0		50,000,000.0		50,000,000
Preferred stock, par value	$ 0.01		$ 0.01		$ 0.01
Common stock shares issued	32,020,378		32,020,378		31,772,791
Common stock shares outstanding	32,020,378		32,020,378		31,772,791
Preferred stock shares outstanding	0		0		0
Shares authorized to be repurchased							4,500,000
Treasury Stock Acquired, Average Cost Per Share	$ 64.84	$ 45.42	$ 64.84	$ 54.46
Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 10.6	$ 12.7
Common stock repurchased	30,400	800,000	30,400	1,800,000
Common stock repurchased, amount	$ 2.0	$ 35.9	$ 2.0	$ 98.3
Maximum [Member]
Class of Stock [Line Items]
Shares available to be purchased	1,477,817		1,477,817
Omnibus 2022 Incentive Plan [Member]
Class of Stock [Line Items]
Vesting of stock-based compensation awards, shares			400,000	500,000
Common stock shares for stock award issuance	2,500,000		2,500,000			3,100,000
2017 Incentive Plan [Member]
Class of Stock [Line Items]
Common stock shares for stock award issuance						51,200
Distribution Agreement [Member]
Class of Stock [Line Items]
Aggregate offering price			$ 100.0
Available for sale, common stock	$ 100.0		$ 100.0
Common stock shares sold and issued			0	0