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Pension and Supplemental Executive Retirement Plans - Defined Benefit Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Components of net periodic pension cost
Interest cost	$ 113	$ 85	$ 226	$ 170
Expected return on plan assets	(164)	(167)	(328)	(334)
Amortization of net actuarial loss	29	107	58	214
Net periodic benefit (income) cost	(22)	25	(44)	50
Contributions paid	0	0	0	0
Service cost	0	0	0	0
Amortization of prior service cost	$ 0	$ 0	$ 0	$ 0

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