Note 15 - Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Unrealized Gains (Losses) On Securities			Changes in fair value of derivative contracts designated as hedge transactions			Adjustments For Pension Plans			Total Accumulated Other Comprehensive Loss, Net
Balance January 1, 2018	$	3,719		$	5,030		$	(32,122	)	$	(23,373	)
Change in accounting		(1,289	)		—			—			(1,289	)
2018 change		(2,443	)		(13,814	)		(1,550	)		(17,807	)
Balance December 31, 2018		(13	)		(8,784	)		(33,672	)		(42,469	)
2019 change		—			8,436			(3,277	)		5,159
Balance December 31, 2019		(13	)		(348	)		(36,949	)		(37,310	)
2020 change		—			7,980			(3,559	)		4,421
Balance December 31, 2020	$	(13	)	$	7,632		$	(40,508	)	$	(32,889	)

	Income Tax Effect of:
	Unrealized Gains (Losses) On Securities			Changes in fair value of derivative contracts designated as hedge transactions		Adjustments For Pension Plans		Total Accumulated Other Comprehensive Loss, Net
Balance January 1, 2018	$	1,791		$	—	$	10,120	$	11,911
2018 change		(1,791	)		—		2,455		664
Balance December 31, 2018		—			—		12,575		12,575
2019 change		—			—		—		—
Balance December 31, 2019		—			—		12,575		12,575
2020 change		—			—		—		—
Balance December 31, 2020	$	—		$	—	$	12,575	$	12,575