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

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension Benefits												Other Post-Employment Benefits
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
	September 30,						September 30,						September 30,						September 30,
	2021			2020			2021			2020			2021			2020			2021			2020
Service Cost	$	278		$	296		$	836		$	887		$	—		$	—		$	—		$	—
Interest Cost		3,563			5,044			10,667			15,132			1,819			3,199			5,456			9,597
Expected Return on Plan Assets		(10,542	)		(10,455	)		(31,626	)		(31,365	)		—			—			—			—
Amortization of Prior Service Credits		—			—			—			—			(602	)		(601	)		(1,804	)		(1,804	)
Amortization of Actuarial Loss		1,368			1,730			4,102			5,191			1,629			2,319			4,887			6,958
Settlement Loss Recognized		—			—			22			—			—			—			—			—
Net Periodic Benefit (Credit) Cost	$	(5,333	)	$	(3,385	)	$	(15,999	)	$	(10,155	)	$	2,846		$	4,917		$	8,539		$	14,751