Note 17 - Other Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	For the Years Ended
	December 31,
	2020			2019			2018
Net periodic benefit costs	$	1,700		$	1,483		$	2,088
Discount rate assumption used to determine net periodic benefit costs		2.86	%		3.97	%		3.22	%