Goodwill and Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Goodwill [Abstract]
Net balance - beginning of period			$ 168,491
Goodwill acquisitions during the period			174,114
Net balance - end of period	$ 342,605		342,605
Identifiable Intangible Assets [Abstract]
Net balance - beginning of period			85,294
Acquisitions during the period			165,076
Accumulated amortization during the period	(2,100)	$ 0	(4,711)	$ 0
Net balance - end of period	245,659		245,659
Expected Amortization Expense [Abstract]
2022 (excluding the nine months ended June 30, 2022)	2,048		2,048
2023	8,190		8,190
2024	8,190		8,190
2025	8,190		8,190
2026	8,190		8,190
Thereafter	42,386		42,386
Finite-Lived Intangible Assets, Net	77,194		77,194
Trade Names [Member]
Identifiable Intangible Assets [Abstract]
Net balance - beginning of period			85,294
Acquisitions during the period			83,171
Net balance - end of period	168,465		168,465
Design Libraries [Member]
Identifiable Intangible Assets [Abstract]
Net balance - beginning of period			0
Acquisitions during the period			14,050
Accumulated amortization during the period			(808)
Net balance - end of period	13,242		13,242
Customer Relationships [Member]
Identifiable Intangible Assets [Abstract]
Net balance - beginning of period			0
Acquisitions during the period			67,855
Accumulated amortization during the period			(3,903)
Net balance - end of period	$ 63,952		$ 63,952