Pension Plans - Qualified Plan - Net Periodic Pension (Income) Expense (Details) - Pension Plan [Member] - Qualified Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	$ 2,253	$ 1,715	$ 1,969
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)
Expected return on plan assets	$ (3,701)	$ (4,253)	$ (4,101)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)
Amortization of net actuarial loss	$ 667	$ 689	$ 1,004
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)
Net settlement loss	$ 1,894	$ 1,379	$ 1,740
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)	Other Nonoperating Gains (Losses)
Total net periodic pension (income) expense	$ 1,113	$ (470)	$ 612