Pension and Supplemental Executive Retirement Plans - Defined Benefit Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Components of net periodic pension cost
Interest cost	$ 113	$ 85	$ 339	$ 255
Expected return on plan assets	(164)	(167)	(492)	(501)
Amortization of net actuarial loss	29	107	87	321
Net periodic benefit (income) cost	(22)	25	(66)	75
Contributions paid	0	0	0	0
Service cost	0	0	0	0
Amortization of prior service cost	$ 0	$ 0	$ 0	$ 0