Note 4 - Restructuring (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Restructuring and Related Costs [Table Text Block]

	Year Ended December 31, 2020
	Infrastructure Solutions			Corrosion Protection			Corporate		Continuing Operations			Discontinued Operations		Total
Severance and benefit related costs	$	29		$	3,673		$	324	$	4,026		$	571	$	4,597
Contract termination costs		66			(166	)		—		(100	)		199		99
Relocation and other moving costs		99			137			—		236			34		270
Other restructuring costs (1)		(1,626	)		5,864			2,879		7,117			4,654		11,771
Total pre-tax restructuring charges	$	(1,432	)	$	9,508		$	3,203	$	11,279		$	5,458	$	16,737

	Year Ended December 31, 2019
	Infrastructure Solutions		Corrosion Protection		Corporate		Continuing Operations		Discontinued Operations		Total
Severance and benefit related costs	$	938	$	3,179	$	1,685	$	5,802	$	553	$	6,355
Contract termination costs		601		1,089		98		1,788		234		2,022
Relocation and other moving costs		190		408		—		598		55		653
Other restructuring costs (1)		13,642		4,592		4,258		22,492		819		23,311
Total pre-tax restructuring charges	$	15,371	$	9,268	$	6,041	$	30,680	$	1,661	$	32,341

	Year Ended December 31, 2018
	Infrastructure Solutions		Corrosion Protection		Corporate		Continuing Operations		Discontinued Operations		Total
Severance and benefit related costs	$	3,038	$	1,094	$	170	$	4,302	$	234	$	4,536
Contract termination costs		1,999		25		150		2,174		—		2,174
Relocation and other moving costs		184		—		—		184		—		184
Other restructuring costs (1)		13,311		7,936		1,317		22,564		28		22,592
Total pre-tax restructuring charges	$	18,532	$	9,055	$	1,637	$	29,224	$	262	$	29,486

	Year Ended December 31, 2020
	Infrastructure Solutions			Corrosion Protection			Corporate		Continuing Operations			Discontinued Operations		Total (1)
Cost of revenues	$	69		$	1,952		$	—	$	2,021		$	—	$	2,021
Operating expenses		(357	)		3,947			2,360		5,950			—		5,950
Restructuring and related charges		194			3,644			324		4,162			—		4,162
Other expense (2)		(1,338	)		(35	)		519		(854	)		—		(854	)
Loss from discontinued operations		—			—			—		—			5,458		5,458
Total pre-tax restructuring charges	$	(1,432	)	$	9,508		$	3,203	$	11,279		$	5,458	$	16,737

	Year Ended December 31, 2019
	Infrastructure Solutions		Corrosion Protection		Corporate		Continuing Operations		Discontinued Operations		Total (1)
Cost of revenues	$	469	$	1,869	$	—	$	2,338	$	—	$	2,338
Operating expenses		5,349		1,131		3,444		9,924		—		9,924
Restructuring and related charges		1,729		4,676		1,783		8,188		—		8,188
Other expense (2)		7,824		1,592		814		10,230		—		10,230
Income from discontinued operations		—		—		—		—		1,661		1,661
Total pre-tax restructuring charges	$	15,371	$	9,268	$	6,041	$	30,680	$	1,661	$	32,341

	Year Ended December 31, 2018
	Infrastructure Solutions		Corrosion Protection		Corporate		Continuing Operations		Discontinued Operations		Total (1)
Cost of revenues	$	1,281	$	600	$	—	$	1,881	$	—	$	1,881
Operating expenses		7,291		4,547		1,317		13,155		—		13,155
Goodwill impairment		1,389		—		—		1,389		—		1,389
Definite-lived intangible asset impairment		870		1,299		—		2,169		—		2,169
Restructuring and related charges		5,221		1,119		320		6,660		—		6,660
Other expense (2)		2,480		1,490		—		3,970		—		3,970
Income from discontinued operations		—		—		—		—		262		262
Total pre-tax restructuring charges	$	18,532	$	9,055	$	1,637	$	29,224	$	262	$	29,486

Schedule of Restructuring Reserve by Type of Cost [Table Text Block]

								Utilized in 2020
	Reserves at December 31, 2019		2020 Charge to Income		Foreign Currency Translation			Cash(1)		Non-Cash(2)		Reserves at December 31, 2020
Severance and benefit related costs	$	4,389	$	4,597	$	(30	)	$	7,179	$	—	$	1,777
Contract termination costs		953		99		(7	)		1,020		—		25
Relocation and other moving costs		367		270		1			515		—		123
Other restructuring costs		2,379		11,771		35			7,302		4,801		2,082
Total pre-tax restructuring charges	$	8,088	$	16,737	$	(1	)	$	16,016	$	4,801	$	4,007

								Utilized in 2019
	Reserves at December 31, 2018		2019 Charge to Income		Foreign Currency Translation			Cash(1)		Non-Cash(2)		Reserves at December 31, 2019
Severance and benefit related costs	$	1,742	$	6,355	$	(11	)	$	3,697	$	—	$	4,389
Contract termination costs		359		2,022		(20	)		1,408		—		953
Relocation and other moving costs		—		653		(3	)		283		—		367
Other restructuring costs		311		23,311		(4	)		8,457		12,782		2,379
Total pre-tax restructuring charges	$	2,412	$	32,341	$	(38	)	$	13,845	$	12,782	$	8,088

								Utilized in 2018
	Reserves at December 31, 2017		2018 Charge to Income		Foreign Currency Translation			Cash(1)		Non-Cash(2)		Reserves at December 31, 2018
Severance and benefit related costs	$	3,864	$	4,536	$	(69	)	$	6,589	$	—	$	1,742
Contract termination costs		650		2,174		(19	)		2,446		—		359
Relocation and other moving costs		—		184		—			184		—		—
Other restructuring costs		675		22,592		(3	)		5,581		17,372		311
Total pre-tax restructuring charges	$	5,189	$	29,486	$	(91	)	$	14,800	$	17,372	$	2,412