Goodwill and Intangible Assets (Tables)

12 Months Ended

May 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

As of May 31, 2018 and 2017, intangible assets consisted of the following:

	May 31, 2018
	Gross carrying value		Accumulated amortization			Net carrying value
(in thousands)
Product technologies	$	147,175	$	(68,880	)	$	78,295
Customer relationships	56,428		(23,237		)	33,191
Trademarks	28,400		(11,809		)	16,591
Licenses	5,752		(4,357		)	1,395
Distributor relationships	1,250		(412		)	838
	$	239,005	$	(108,695	)	$	130,310

	May 31, 2017
	Gross carrying value		Accumulated amortization			Net carrying value
(in thousands)
Product technologies	$	147,172	$	(59,696	)	$	87,476
Customer relationships	56,375		(19,194		)	37,181
Trademarks	28,400		(9,069		)	19,331
Licenses	4,487		(3,821		)	666
Distributor relationships	1,250		(229		)	1,021
	$	237,684	$	(92,009	)	$	145,675

Expected amortization expense

Annual amortization of these intangible assets is expected to approximate the following amounts for each of the next five fiscal years:

(in thousands)
2019	$	16,555
2020	15,001
2021	13,842
2022	12,958
2023	12,507
2024 and thereafter	59,447
	$	130,310