Cash, Cash Equivalents, and Restricted Cash (Narrative) (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Surety, Payment and Performance Bonds [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Collateral	$ 0	$ 0
Surety, payment and performance bonds	42,000,000.0	42,300,000
Workers Compensation Policy [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Collateral	2,400,000	2,300,000
Payment and Performance Bonds [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Collateral	$ 6,100,000	$ 6,000,000.0