Employee Benefit Plans - Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net periodic benefit cost
Employer contributions			$ 1,900	$ 1,900
Pension
Net periodic benefit cost
Service cost	$ 10	$ 15	30	45
Interest cost	$ 766	$ 486	$ 2,275	$ 1,458
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Income (Expense), Nonoperating, Net	Interest Income (Expense), Nonoperating, Net	Interest Income (Expense), Nonoperating, Net	Interest Income (Expense), Nonoperating, Net
Expected return on plan assets	$ (682)	$ (724)	$ (2,025)	$ (2,172)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Amortization of prior service cost	$ 89	$ 53	$ 266	$ 159
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Amortization of net loss	$ 395	$ 646	$ 1,171	$ 1,938
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Net periodic benefit cost	$ 578	$ 476	$ 1,717	$ 1,428