Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2025

Retirement Benefits [Abstract]

Components of Net Periodic Benefits Cost

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

	Three Months Ended June 30,
	Pension Benefits						Other Post-Retirement Benefits
(in thousands)	2025			2024			2025			2024
Service cost	$	1,551		$	1,927		$	9		$	9
Interest cost		6,273			6,010			154			154
Expected return on plan assets		(11,266	)		(11,906	)		—			—
Amortization of net (gain) or loss and prior service costs		1,118			1,420			(185	)		(185	)
Net periodic benefit cost	$	(2,324	)	$	(2,549	)	$	(22	)	$	(22	)

	Six Months Ended June 30,
	Pension Benefits						Other Post-Retirement Benefits
($ in thousands)	2025			2024			2025			2024
Service cost (benefit)	$	3,151		$	3,906		$	18		$	18
Interest cost		12,548			11,930			308			308
Expected return on plan assets		(22,534	)		(23,823	)		—			—
Amortization of net (gain) or loss and prior service costs		2,258			2,624			(370	)		(370	)
Net periodic benefit cost	$	(4,577	)	$	(5,363	)	$	(44	)	$	(44	)