PARENT COMPANY FINANCIAL STATEMENTS - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
CONDENSED STATEMENTS OF OPERATIONS [Abstract]
Interest expense	$ 462	$ 1,755	$ 1,377	$ 1,278	$ 1,389	$ 1,508	$ 1,819	$ 2,147	$ 3,894	$ 5,269	$ 11,666	$ 12,974	$ 4,872	$ 6,863	$ 33,803
Other expense													385,275	343,683	319,051
Income tax expense (benefit)													27,964	10,701	5,661
Net income before noncontrolling interest													159,354	145,745	109,344
Net income attributable to parent	$ 23,420	$ 22,391	$ 49,251	$ 61,324	$ 15,903	$ 38,701	$ 59,066	$ 28,037	$ 13,158	$ 18,190	$ 52,304	$ 21,068	156,386	141,708	104,720
Meta Financial
CONDENSED STATEMENTS OF OPERATIONS [Abstract]
Interest expense													3,982	4,915	5,168
Other expense													1,062	1,287	1,256
Total expense													5,044	6,202	6,424
Loss before income taxes and equity in undistributed net income of subsidiaries													(5,044)	(6,202)	(6,424)
Income tax expense (benefit)													(1,029)	395	(3,638)
Loss before equity in undistributed net income of subsidiaries													(4,015)	(6,597)	(2,786)
Equity in undistributed net income of subsidiaries													159,652	147,895	107,476
Other Income													749	410	30
Net income before noncontrolling interest													160,401	148,305	107,506
Net income attributable to parent													$ 156,386	$ 141,708	$ 104,720