GOODWILL AND INTANGIBLE ASSETS - NET (Tables)

12 Months Ended

Sep. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Carrying Amount of Goodwill

Goodwill consisted of the following (in thousands):

	Residential		Commercial		Total
Goodwill before impairment as of September 30, 2023	$	953,882	$	72,589	$	1,026,471
Accumulated impairment losses as of September 30, 2023	—		(32,200)		(32,200)
Goodwill, net as of September 30, 2023	$	953,882	$	40,389	$	994,271
Divestiture
Goodwill disposal before impairment	$	—	$	(58,655)	$	(58,655)
Accumulated impairment losses	—		32,200		32,200
Goodwill, net disposal	$	—	$	(26,455)	$	(26,455)
Goodwill before impairment as of September 30, 2024	$	953,882	$	13,934	$	967,816
Accumulated impairment losses as of September 30, 2024	—		—		—
Goodwill, net as of September 30, 2024	$	953,882	$	13,934	$	967,816

Summary of Finite-lived Intangible Assets

Finite-lived intangible assets consisted of the following (in thousands):

		As of September 30, 2024
	Lives in Years	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Propriety knowledge	10 — 15	$	300,490	$	(268,358)	$	32,132
Trademarks	5 — 20	217,730		(167,015)		50,715
Customer relationships	12 — 19	156,452		(86,600)		69,852
Patents	9 — 10	8,500		(6,715)		1,785
Other intangible assets	3 — 15	4,076		(4,042)		34
Total intangible assets		$	687,248	$	(532,730)	$	154,518

		As of September 30, 2023
	Lives in Years	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Propriety knowledge	10 — 15	$	300,400	$	(253,608)	$	46,792
Trademarks	5 — 20	230,240		(164,759)		65,481
Customer relationships	12 — 19	176,852		(92,268)		84,584
Patents	9 — 10	8,500		(5,913)		2,587
Other intangible assets	3 — 15	4,076		(4,023)		53
Total intangible assets		$	720,068	$	(520,571)	$	199,497

Summary of Expected Amortization Expense Relating to Intangible Assets

Amortization expense relating to these amortizable intangible assets as of September 30, 2024, is expected to be as follows (in thousands):

2025	$	34,015
2026	28,698
2027	23,381
2028	18,064
2029	13,028
Thereafter	37,332
Total	$	154,518