Components of Net Periodic Benefit Cost - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1,212	$ 1,199	$ 2,424	$ 2,398
Interest cost	3,100	2,790	6,200	5,581
Expected return on plan assets	(8,119)	(7,480)	(16,239)	(14,960)
Prior service cost	0	0	0	0
Net (gain)	512	0	1,024	0
Net periodic (income) benefit cost	(3,295)	(3,491)	(6,591)	(6,981)
Pension Plan | Acquired RSI Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0	0	0	0
Interest cost	0	76	0	152
Expected return on plan assets	0	(122)	0	(243)
Net (gain)	0	0	0	0
Net periodic (income) benefit cost	0	(46)	0	(91)
RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	61	69	122	138
Interest cost	162	158	324	316
Expected return on plan assets	0	0	0	0
Prior service cost	0	0	0	0
Net (gain)	28	14	56	28
Net periodic (income) benefit cost	251	241	502	482
Post-retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	54	54	108	108
Interest cost	248	242	496	485
Expected return on plan assets	0	0	0	0
Prior service cost	0	0	0	0
Net (gain)	0	0	0	0
Net periodic (income) benefit cost	302	296	604	593
Post-retirement Plan | Acquired RSI Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	13	17	26	34
Interest cost	31	27	62	53
Expected return on plan assets	0	0	0	0
Net (gain)	(5)	(15)	(10)	(30)
Net periodic (income) benefit cost	39	29	78	57
Split-Dollar Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	57	69	114	139
Interest cost	208	204	416	409
Expected return on plan assets	0	0	0	0
Prior service cost	14	14	28	28
Net (gain)	0	0	0	0
Net periodic (income) benefit cost	$ 279	$ 287	$ 558	$ 576