Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, cost recognized	$ 20,900	$ 10,600	$ 10,900
Look-back Period Under Employee Stock Purchase Plan	6 months
Discount On Common Stock Under Employee Stock Purchase Plan, Percent	10.00%
Issuances of common stock under the employee stock purchase plan (In Shares)	58,440
Issuances of common stock under the employee stock purchase plan	$ 1,185
Shares Available For Purchase Under Employee Stock Purchase Plan	27,206
Salary continuation plan minimum period	10 years
Salary continuation plan maximum period	20 years
Present value of future salary contribution plan benefits	$ 49,000	25,600
Postemployment benefits, period expense	4,800	1,500	$ 2,200
Deferred compensation cash-based arrangements, liability, current and noncurrent	13,700	11,400
Cash surrender value of life insurance	680,900	331,800
Other postretirement defined benefit plan, liabilities	$ 6,300	4,000
Employee Stock [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date	90.00%
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.02%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Normal Retirement Age	65
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Annual Cost Of Living Benefit Adjustment	2.00%
Defined Benefit Plan, Benefit Obligation	$ 18,800
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other deferred compensation arrangements, liability, current and noncurrent	$ 517	568
Percentage of deferred salary	50.00%
Deferred compensation liability, current and noncurrent	$ 13,100	9,700
Pension and other postretirement defined benefit plans, liabilities	$ 16,700	$ 8,700