Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2024

Retirement Benefits [Abstract]

Components of Net Periodic Benefits Cost

The following tables show the components of net periodic benefit cost included in expense for the periods indicated.

	Three Months Ended September 30,
	Pension Benefits						Other Post-Retirement Benefits
(in thousands)	2024			2023			2024			2023
Service cost	$	1,900		$	1,979		$	7		$	8
Interest cost		6,056			6,052			135			160
Expected return on plan assets		(11,901	)		(11,177	)		—			—
Amortization of net (gain) or loss and prior service costs		1,530			1,981			(215	)		(243	)
Net periodic benefit cost	$	(2,415	)	$	(1,165	)	$	(73	)	$	(75	)

	Nine Months Ended September 30,
	Pension Benefits						Other Post-Retirement Benefits
($ in thousands)	2024			2023			2024			2023
Service cost (benefit)	$	5,806		$	5,938		$	25		$	(13	)
Interest cost		17,986			17,803			443			525
Expected return on plan assets		(35,724	)		(33,533	)		—			—
Amortization of net (gain) or loss and prior service costs		4,154			5,662			(585	)		(652	)
Net periodic benefit cost	$	(7,778	)	$	(4,130	)	$	(117	)	$	(140	)