Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits
Components of net periodic benefit cost
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	797	819	2,391	2,456
Expected return on plan assets	(1,287)	(1,198)	(3,860)	(3,592)
Amortization of net retirement plan actuarial loss	244	289	732	867
Amortization of net retirement plan prior service (credit) cost	0	0	0	0
Net periodic benefit (income) cost	(246)	(90)	(737)	(269)
Life and Health
Components of net periodic benefit cost
Service cost	6	8	19	24
Interest cost	86	89	257	266
Expected return on plan assets	0	0	0	0
Amortization of net retirement plan actuarial loss	(15)	(10)	(46)	(30)
Amortization of net retirement plan prior service (credit) cost	(11)	(16)	(32)	(46)
Net periodic benefit (income) cost	66	71	198	214
SERP Benefits
Components of net periodic benefit cost
Service cost	15	11	44	32
Interest cost	283	287	848	861
Expected return on plan assets	0	0	0	0
Amortization of net retirement plan actuarial loss	0	0	0	0
Amortization of net retirement plan prior service (credit) cost	56	69	169	208
Net periodic benefit (income) cost	$ 354	$ 367	$ 1,061	$ 1,101