Goodwill and other intangible assets

6 Months Ended

Apr. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill for the six months ended April 30, 2022 by operating segment were as follows:


	Industrial Precision Solutions		Advanced Technology Solutions		Total
Balance at October 31, 2021	$	415,020	$	1,298,128	$	1,713,148
Acquisitions	129,856		—		129,856
Currency effect	(12,431)		(9,482)		(21,913)
Balance at April 30, 2022	$	532,445	$	1,288,646	$	1,821,091

The increase in goodwill for the six months ended April 30, 2022 was due to the acquisition of NDC. See Acquisitions Note for additional details.

Information regarding our intangible assets subject to amortization was as follows:


	April 30, 2022
	Carrying Amount		Accumulated Amortization		Net Book Value
Customer relationships	$	485,584	$	238,359	$	247,225
Patent/technology costs	160,542		92,682		67,860
Trade name	83,806		42,209		41,597
Non-compete agreements	10,448		9,184		1,264
Other	1,209		1,203		6
Total	$	741,589	$	383,637	$	357,952

	October 31, 2021
	Carrying Amount		Accumulated Amortization		Net Book Value
Customer relationships	$	483,815	$	226,658	$	257,157
Patent/technology costs	154,267		89,299		64,968
Trade name	74,301		39,858		34,443
Non-compete agreements	9,896		9,099		797
Other	1,385		1,383		2
Total	$	723,664	$	366,297	$	357,367

Amortization expense for the three months ended April 30, 2022 and 2021 was $12,572 and $12,617, respectively. Amortization expense for the six months ended April 30, 2022 and 2021 was $25,657 and $25,697, respectively. See Acquisitions Note for details regarding intangibles recorded due to the acquisition of NDC.