Goodwill and Other Intangible Assets

3 Months Ended

Dec. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Note 5. Goodwill and Other Intangible Assets

(a) Goodwill

The changes in the carrying amount of goodwill as of December 31, 2019 are as follows (dollars in thousands):

	Total
Balance as of October 1, 2019	$	1,119,329
Acquisitions		—
Effect of foreign currency translation		3,536
Balance as of December 31, 2019	$	1,122,865

(b) Intangible Assets, Net

The following tables summarizes the gross carrying amounts and accumulated amortization of intangible assets by major class (dollars in thousands):

	December 31, 2019
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Customer relationships	$	108,863	$	(65,369	)	$	43,494		3.7
Technology and patents		90,174		(72,955	)		17,219		2.3
Total	$	199,037	$	(138,324	)	$	60,713

	September 30, 2019
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Customer relationships	$	104,783	$	(58,568	)	$	46,215		4.0
Technology and patents		116,757		(97,411	)		19,346		2.5
Total	$	221,540	$	(155,979	)	$	65,561

Amortization expense related to intangible assets in the aggregate was $5.2 million and $5.3 million for the three months ended December 31, 2019 and 2018, respectively. We expect amortization of intangible assets to be $15.5 million for the remainder of 2020.