Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Benefits
Components of net periodic benefit cost
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	529	327	992	814
Expected return on plan assets	(1,474)	(1,411)	(2,942)	(2,826)
Amortization of net retirement plan actuarial loss	285	397	608	780
Amortization of net retirement plan prior service (credit) cost	0	0	0	0
Net periodic benefit (income) cost	(660)	(687)	(1,342)	(1,232)
Life and Health
Components of net periodic benefit cost
Service cost	43	42	87	93
Interest cost	59	36	111	90
Expected return on plan assets	0	0	0	0
Amortization of net retirement plan actuarial loss	46	82	98	156
Amortization of net retirement plan prior service (credit) cost	(15)	(15)	(30)	(30)
Net periodic benefit (income) cost	133	145	266	309
SERP Benefits
Components of net periodic benefit cost
Service cost	(13)	55	39	115
Interest cost	206	147	407	346
Expected return on plan assets	0	0	0	0
Amortization of net retirement plan actuarial loss	183	233	423	540
Amortization of net retirement plan prior service (credit) cost	68	70	139	141
Net periodic benefit (income) cost	$ 444	$ 505	$ 1,008	$ 1,142