Summary of Significant Accounting Policies, Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Contract Liability [Abstract]
Beginning contract liability	$ 46,610	$ 17,280
Revenue recognized from contract liabilities included in the beginning balance	(43,777)	(16,873)
Increases due to business combinations and cash received, net of amounts recognized in revenue during the period	62,627	46,203
Ending contract liability	65,460	46,610	$ 17,280
Contract Asset [Abstract]
Contract asset	$ 3,700	$ 2,300
Timing of Revenue [Abstract]
Percentage on Timing of Revenue Recognition	100.00%	100.00%	100.00%
Transferred at Point in Time [Member]
Timing of Revenue [Abstract]
Percentage on Timing of Revenue Recognition	94.40%	93.90%	95.50%
Transferred over Time [Member]
Timing of Revenue [Abstract]
Percentage on Timing of Revenue Recognition	5.60%	6.10%	4.50%