Pension and Other Postretirement Benefit Costs

3 Months Ended

Mar. 31, 2023

Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]

Schedule of Net Benefit Costs

The following table provides the components of net periodic benefit cost (credit) for the pension and other postretirement benefit plans:

	Three Months Ended March 31,
	Pension Benefits				Other Postretirement Benefits
In thousands	2023		2022		2023		2022
Service cost	$	1,049	$	1,530	$	28	$	47
Interest cost	5,218		3,659		248		180
Expected return on plan assets	(6,661)		(6,427)		—		—
Amortization of prior service credit	—		—		—		(83)
Amortization of net actuarial loss	139		3,198		—		99
Net periodic benefit cost (credit)	(255)		1,960		276		243
Amount allocated to construction	(474)		(664)		(11)		(18)
Net periodic benefit cost (credit) charged to expense	(729)		1,296		265		225
Amortization of regulatory balancing account	2,801		2,801		—		—
Net amount charged to expense	$	2,072	$	4,097	$	265	$	225

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

The following table presents amounts recognized in accumulated other comprehensive loss (AOCL) and the changes in AOCL related to non-qualified employee benefit plans:

	Three Months Ended March 31,
In thousands	2023		2022
Beginning balance	$	(6,414)	$	(11,404)
Amounts reclassified from AOCL:
Amortization of actuarial losses	139		268
Total reclassifications before tax	139		268
Tax benefit	(37)		(71)
Total reclassifications for the period	102		197
Ending balance	$	(6,312)	$	(11,207)