Employee Benefit Plans - 401(K) Saving And Retirement Plan (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Non Employee Director
Non-Employee Benefit Plan Compensation
Granted (in shares)	6,650	2,585	9,940	5,238
Compensation cost	$ 0.1	$ 0.1	$ 0.2	$ 0.2
Savings And Retirement Plan 401 K
401(K) Savings & Retirement Plan
Common stock, shares issued			201,180	12,513
Total expense (including issuance of shares)	$ 2.0	$ 0.9	$ 4.3	$ 2.2