Note 7 - Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Goodwill and Intangible Assets Disclosure [Text Block]

7. GOODWILL AND INTANGIBLE ASSETS

Goodwill

The following table presents a reconciliation of the beginning and ending balances of goodwill (in thousands):

	Infrastructure Solutions			Corrosion Protection			Energy Services			Total
Balance, December 31, 2019
Goodwill, gross	$	240,160		$	76,946		$	81,504		$	398,610
Accumulated impairment losses		(62,848	)		(45,400	)		(33,527	)		(141,775	)
Goodwill, net		177,312			31,546			47,977			256,835
2020 Activity:
Foreign currency translation		(884	)		(742	)		—			(1,626	)
Balance, March 31, 2020
Goodwill, gross		239,276			76,204			81,504			396,984
Accumulated impairment losses		(62,848	)		(45,400	)		(33,527	)		(141,775	)
Goodwill, net	$	176,428		$	30,804		$	47,977		$	255,209

Intangible Assets

Intangible assets consisted of the following (in thousands):

	March 31, 2020								December 31, 2019
	Weighted Average Useful Lives (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
License agreements	0.5	$	3,894	$	(3,848	)	$	46	$	3,894	$	(3,824	)	$	70
Leases	0.8		864		(798	)		66		864		(777	)		87
Trademarks	9.5		15,690		(7,069	)		8,621		15,699		(6,911	)		8,788
Non-competes	3.1		2,286		(1,416	)		870		2,301		(1,354	)		947
Customer relationships	7		157,241		(79,264	)		77,977		157,576		(76,832	)		80,744
Patents and acquired technology	7.5		38,637		(24,833	)		13,804		39,289		(25,097	)		14,192
Total intangible assets	—	$	218,612	$	(117,228	)	$	101,383	$	219,623	$	(114,795	)	$	104,828

Amortization expense was $3.4 million and $3.5 million for the quarters ended March 31, 2020 and 2019, respectively. Estimated amortization expense for the years ended December 31, 2020, 2021, 2022, 2023 and 2024 is $13.2 million, $13.0 million, $13.0 million, $13.0 million and $12.3 million, respectively.