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

9 Months Ended

Sep. 30, 2020

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,
	2020			2019			2020			2019			2020			2019			2020			2019
Service Cost	$	296		$	987		$	887		$	2,963		$	—		$	—		$	—		$	—
Interest Cost		5,044			6,275			15,132			18,825			3,199			4,580			9,597			13,740
Expected Return on Plan Assets		(10,455	)		(10,114	)		(31,365	)		(30,343	)		—			—			—			—
Amortization of Prior Service Credits		—			(92	)		—			(275	)		(601	)		(601	)		(1,804	)		(1,804	)
Amortization of Actuarial Loss		1,730			1,490			5,191			4,469			2,319			2,315			6,958			6,946
Net Periodic Benefit (Credit) Cost	$	(3,385	)	$	(1,454	)	$	(10,155	)	$	(4,361	)	$	4,917		$	6,294		$	14,751		$	18,882