Employee Benefit Plans (Pre-tax Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) - Postretirement health care benefit plan $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Details of the pre-tax amounts recognized in accumulated other comprehensive loss
Balance at beginning of year, Unamortized Actuarial Net Losses	$ (11,678)
Balance at beginning of year, Unamortized Prior Service Costs	5,009
Amounts arising during the period, Unamortized Actuarial Net Losses	(66)
Amounts arising during the period, Unamortized Prior Service Costs	0
Amounts recognized as a component of net periodic benefit cost, Unamortized Actuarial Net Losses	0
Amounts recognized as a component of net periodic benefit cost, Unamortized Prior Service Costs	1,234
Balance at end of year, Unamortized Actuarial Net Losses	(11,744)
Balance at end of year, Unamortized Prior Service Costs	$ 6,243