Pension Plans And Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2020

Components of Net Periodic Benefit Cost

	Pension Benefits						Other Postretirement Benefits
	2020			2019			2020			2019
Service cost	$	5,546		$	4,874		$	979		$	772
Interest cost	6,971			7,138			1,515			1,372
Expected return on plan assets	(9,125		)	(7,815		)	(630		)	(718		)
Amortization of prior service cost	75			75			(275		)	(275		)
Net loss recognition	1,654			2,415			1,243			1,246
Net periodic benefit cost	$	5,121		$	6,687		$	2,832		$	2,397

Total service costs in the table above are recorded to the same accounts as labor expense. Labor and benefits expense is recorded to various projects based on whether the work is a capital project or an operating expense. Approximately 40 percent of all labor and benefits is capitalized to utility property and 60 percent is expensed to utility other operating expenses.

The non-service portion of costs in the table above are recorded to other expense below income from operations in the Condensed Consolidated Statements of Income or capitalized as a regulatory asset. Approximately 40 percent of the costs are capitalized to regulatory assets and 60 percent is expensed to the income statement.