Note 5 - Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension Benefits						Other Post-Employment Benefits
	Three Months Ended						Three Months Ended
	March 31,						March 31,
	2021			2020			2021			2020
Service Cost	$	279		$	296		$	—		$	—
Interest Cost		3,550			5,044			1,818			3,199
Expected Return on Plan Assets		(10,542	)		(10,455	)		—			—
Amortization of Prior Service Credits		—			—			(601	)		(601	)
Amortization of Actuarial Loss		1,367			1,730			1,629			2,319
Net Periodic Benefit (Credit) Cost	$	(5,346	)	$	(3,385	)	$	2,846		$	4,917