Note 4 - Restructuring (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Restructuring and Related Costs [Table Text Block]

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

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

	Year Ended December 31, 2017
	Infrastructure Solutions		Corrosion Protection		Corporate		Total
Severance and benefit related costs	$	4,274	$	2,442	$	629	$	7,345
Contract termination costs		4,545		775		—		5,320
Relocation and other moving costs		26		121		—		147
Other restructuring costs (1)		8,434		1,522		975		10,931
Total pre-tax restructuring charges	$	17,279	$	4,860	$	1,604	$	23,743

	Year Ended December 31, 2019
	Infrastructure Solutions		Corrosion Protection		Energy Services		Corporate		Total (1)
Cost of revenues	$	469	$	1,869	$	—	$	—	$	2,338
Operating expenses		5,349		1,131		819		3,444		10,743
Restructuring and related charges		1,729		4,676		842		1,783		9,030
Other expense (2)		7,824		1,592		—		814		10,230
Total pre-tax restructuring charges	$	15,371	$	9,268	$	1,661	$	6,041	$	32,341

	Year Ended December 31, 2018
	Infrastructure Solutions		Corrosion Protection		Energy Services		Corporate		Total (1)
Cost of revenues	$	1,281	$	600	$	—	$	—	$	1,881
Operating expenses		7,291		4,547		28		1,317		13,183
Goodwill impairment		1,389		—		—		—		1,389
Definite-lived intangible asset impairment		870		1,299		—		—		2,169
Restructuring and related charges		5,221		1,119		234		320		6,894
Other expense (2)		2,480		1,490		—		—		3,970
Total pre-tax restructuring charges	$	18,532	$	9,055	$	262	$	1,637	$	29,486

	Year Ended December 31, 2017
	Infrastructure Solutions		Corrosion Protection		Corporate		Total (1)
Cost of revenues	$	30	$	15	$	—	$	45
Operating expenses		8,404		1,507		973		10,884
Restructuring and related charges		8,845		3,338		631		12,814
Total pre-tax restructuring charges	$	17,279	$	4,860	$	1,604	$	23,743

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

								Utilized in 2019
	Reserves at December 31, 2018		2019 Charge to Income		Foreign Currency Translation			Cash(1)		Non-Cash		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		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

			Utilized in 2017
	2017 Charge to Income		Cash(1)		Non-Cash		Reserves at December 31, 2017
Severance and benefit related costs	$	7,345	$	3,481	$	—	$	3,864
Contract termination costs		5,320		2,706		1,964		650
Relocation and other moving costs		147		147		—		—
Other restructuring costs		10,931		2,140		8,116		675
Total pre-tax restructuring charges	$	23,743	$	8,474	$	10,080	$	5,189