Goodwill and other intangible assets, net (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill by operating segment

The following table summarizes the changes in goodwill by operating segment for the three months ended March 31, 2020 (in thousands):

	Drainage Pipe & Products			Water Pipe & Products		Total
Balance at December 31, 2019	$	190,466		$	318,360	$	508,826
Foreign currency and other adjustments	(1,145		)	—		(1,145		)
Balance at March 31, 2020	$	189,321		$	318,360	$	507,681

Schedule of intangible assets

Intangible assets other than goodwill at March 31, 2020 and December 31, 2019 included the following (in thousands):

	Net carrying value as of March 31, 2020		Net carrying value as of December 31, 2019
Customer relationships	$	93,277	$	100,869
Trade names	18,453		19,626
Patents	7,012		7,673
Non-compete agreements	7,186		8,070
Developed technology	5,887		5,980
Other	437		456
Total intangible assets	$	132,252	$	142,674