Employee Benefits - Employee Pension Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Employee Benefits
Employee benefit contribution amount	$ 626,000	$ 559,000	$ 2,000,000.0	$ 1,500,000
Employee Pension Plan
Employee Benefits
Net periodic pension cost			390,000,000
Director Pension Plan [Member]
Employee Benefits
Net periodic pension cost	181,000,000	$ 283,000,000	542,000	$ 849,000
Liability, Defined Benefit Plan	$ 5,900,000		$ 5,900,000		$ 5,700,000