Goodwill and Intangible Assets - Net

6 Months Ended

Mar. 31, 2023

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets - Net

6. GOODWILL AND INTANGIBLE ASSETS—NET

Goodwill

Goodwill consisted of the following (in thousands):

	Residential		Commercial		Total
Goodwill as of September 30, 2022	$	953,606	$	40,389	$	993,995
Acquisitions		160		—		160
Goodwill as of March 31, 2023	$	953,766	$	40,389	$	994,155
Accumulated impairment losses as of September 30, 2022		—		32,200		32,200
Accumulated impairment losses as of March 31, 2023	$	—	$	32,200	$	32,200

Intangible assets, net

The Company did not have any indefinite lived intangible assets other than goodwill as of March 31, 2023 and September 30, 2022. Finite-lived intangible assets consisted of the following (in thousands):

		March 31, 2023
	Lives in Years	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Proprietary knowledge	10 — 15	$	300,400	$	(244,899	)	$	55,501
Trademarks	5 — 20		230,240		(158,071	)		72,169
Customer relationships	12 — 19		176,852		(85,258	)		91,594
Patents	9 — 10		8,500		(5,450	)		3,050
Other intangibles	3 — 15		4,076		(4,012	)		64
Total intangible assets		$	720,068	$	(497,690	)	$	222,378

		September 30, 2022
	Lives in Years	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Propriety knowledge	10 — 15	$	300,400	$	(236,024	)	$	64,376
Trademarks	5 — 20		230,240		(151,259	)		78,981
Customer relationships	12 — 19		176,852		(78,015	)		98,837
Patents	9 — 10		8,500		(4,950	)		3,550
Other intangible assets	3 — 15		4,076		(3,985	)		91
Total intangible assets		$	720,068	$	(474,233	)	$	245,835

Amortization expense was $11.6 million and $12.6 million in the three months ended March 31, 2023 and 2022, respectively and $23.5 million and $25.4 million in the six months ended March 31, 2023 and 2022, respectively. As of March 31, 2023, the remaining weighted-average amortization period for acquired intangible assets was 11.1 years.