Defined Contribution Plan (Narrative) (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Defined Contribution Plan [Abstract]
Defined Benefit Plan, Vesting Term	3 months
Defined Benefit Plan, Minimum Age Requirement | item	21
Discretionary matching contribution company percentage	75.00%
Discretionary matching contribution, employee's contribution, maximum	$ 4,000
Company matching contributions	$ 3,200,000	$ 2,900,000	$ 2,700,000