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, 2022 USD ($)
Details of the pre-tax amounts recognized in accumulated other comprehensive loss
Balance at beginning of year, Unamortized Actuarial Net Losses	$ (5,498)
Balance at beginning of year, Unamortized Prior Service Costs	4,098
Amounts arising during the period, Unamortized Actuarial Net Losses	(6,180)
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	911
Balance at end of year, Unamortized Actuarial Net Losses	(11,678)
Balance at end of year, Unamortized Prior Service Costs	$ 5,009