Segment Information (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2022 USD ($) Segment	Dec. 31, 2021 USD ($)	Sep. 30, 2022 USD ($)
Segment Information [Abstract]
Number of reportable segments | Segment	2
Revenue	$ 366,659	$ 336,272
Income (loss) from operations	26,536	31,329
Depreciation and amortization	5,693	1,749
Transaction costs	1,330	3,045
Change in fair value of contingent consideration	(1,409)	$ 5,746
Total assets	1,672,093		$ 1,497,428
Operating Segments [Member] | Dealerships [Member]
Segment Information [Abstract]
Revenue	326,773
Income (loss) from operations	29,853
Depreciation and amortization	1,886
Transaction costs	1,182
Change in fair value of contingent consideration	(1,543)
Total assets	1,283,821
Operating Segments [Member] | Distribution [Member]
Segment Information [Abstract]
Revenue	39,886
Income (loss) from operations	(3,317)
Depreciation and amortization	3,807
Transaction costs	148
Change in fair value of contingent consideration	134
Total assets	$ 388,272