Employee Benefit Plans - 401(K) Saving And Retirement Plan (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Non Employee Director
Non-Employee Benefit Plan Compensation
Granted (in shares)	13,662	4,342	35,444	14,282
Compensation cost	$ 0.1	$ 0.1	$ 0.3	$ 0.3
Savings And Retirement Plan 401 K
401(K) Savings & Retirement Plan
Common stock, shares issued			872,026	310,159
Total expense (including issuance of shares)	$ 3.0	$ 2.5	$ 9.0	$ 6.7