Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2025

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Costs

Components of net periodic benefit (income) cost for the Company's defined benefit plans were as follows (in thousands):

	Three months ended				Six months ended
	June 30, 2025		June 30, 2024		June 30, 2025		June 30, 2024
Pension and SERPA Benefits:
Service cost	$	963	$	1,175	$	1,926	$	2,350
Interest cost	20,501		20,118		41,002		40,237
Expected return on plan assets	(32,799)		(33,143)		(65,598)		(66,286)
Amortization of unrecognized:
Prior service cost	380		188		760		376
Net gain	(174)		(163)		(348)		(326)
Special retirement benefit cost	—		1,722		—		1,722
Net periodic benefit income	$	(11,129)	$	(10,103)	$	(22,258)	$	(21,927)
Postretirement Healthcare Benefits:
Service cost	$	643	$	723	$	1,286	$	1,446
Interest cost	2,618		2,694		5,236		5,388
Expected return on plan assets	(4,675)		(4,424)		(9,350)		(8,848)
Amortization of unrecognized:
Prior service cost (credit)	149		149		298		298
Net gain	(1,369)		(1,250)		(2,738)		(2,500)
Net periodic benefit income	$	(2,634)	$	(2,108)	$	(5,268)	$	(4,216)