Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Retirement Benefits [Abstract]
Defined benefit plan, expected future employer contributions, remainder of fiscal year	$ 0.0		$ 0.0
Employer contributions					$ 1.0
Defined contribution plan, compensation expense	$ 1.0	$ 0.9	$ 2.1	$ 2.0