Compensation Related Costs, Retirement Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Requisite Service Period	3 months
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	75.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	8.00%
Defined Contribution Plan, Cost	$ 5,900,000	$ 5,800,000	$ 5,400,000
Pension Plan | Vested After Two Years of Service
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	25.00%
Pension Plan | Vested After Three Years of Service
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	50.00%
Pension Plan | Vested After Four Years of Service
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	75.00%
Pension Plan | Vested After Five Years of Service
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	100.00%
Postretirement Life Insurance
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 6,800,000	8,600,000	9,000,000
Defined Benefit Plan, Plan Assets, Benefits Paid	1,200,000	1,300,000	1,000,000
Defined Benefit Plan, Base Amount of Death Proceeds, Annual Percentage Increase Until Retirement Age Reached	$ 3
Defined Benefit Plan, Period Death Benefit Required to be Paid Following Participant's Death	90 days
Directors And Officers | Deferred Compensation, Excluding Share-Based Payments and Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Liability, Current and Noncurrent	$ 482,000	593,000
Deferred Compensation Arrangement with Individual, Compensation Expense	2,000	5,000	9,000
Executive Officer | Long Term Incentive Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	$ 555,000	$ 521,000	$ 490,000
Executive Officer | Long Term Incentive Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Requisite Service Period	5 years
Executive Officer | Long Term Incentive Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Requisite Service Period	10 years