LOANS AND LEASES, NET - Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 3,536,305	$ 3,609,563
Consumer finance
Financing Receivable, Past Due [Line Items]
Loans and leases	169,700	252,900
Tax services
Financing Receivable, Past Due [Line Items]
Loans and leases	9,100	10,400
Accruing and Nonaccruing Loans and Leases
Financing Receivable, Past Due [Line Items]
Loans and leases	3,550,351	3,664,009
Accruing and Nonaccruing Loans and Leases | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		199,132
Accruing and Nonaccruing Loans and Leases | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	28,203	19,945
Accruing and Nonaccruing Loans and Leases | 30-59 Days Past Due | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		0
Accruing and Nonaccruing Loans and Leases | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	8,817	8,200
Accruing and Nonaccruing Loans and Leases | 60-89 Days Past Due | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		0
Accruing and Nonaccruing Loans and Leases | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	19,534	24,637
Accruing and Nonaccruing Loans and Leases | Greater Than 89 Days Past Due | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		0
Accruing and Nonaccruing Loans and Leases | Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	56,554	52,782
Accruing and Nonaccruing Loans and Leases | Past Due | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		0
Accruing and Nonaccruing Loans and Leases | Not Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	3,493,797	3,611,227
Accruing and Nonaccruing Loans and Leases | Not Past Due | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		199,132
Accruing and Nonaccruing Loans and Leases | Loans held for sale | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	21,071	56,194
Accruing and Nonaccruing Loans and Leases | Loans held for sale | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Loans held for sale | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Loans held for sale | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Loans held for sale | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Loans held for sale | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	21,071	56,194
Accruing and Nonaccruing Loans and Leases | Term lending | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,090,289	961,019
Accruing and Nonaccruing Loans and Leases | Term lending | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	14,066	11,879
Accruing and Nonaccruing Loans and Leases | Term lending | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,576	2,703
Accruing and Nonaccruing Loans and Leases | Term lending | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	4,458	5,452
Accruing and Nonaccruing Loans and Leases | Term lending | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	21,100	20,034
Accruing and Nonaccruing Loans and Leases | Term lending | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,069,189	940,985
Accruing and Nonaccruing Loans and Leases | Asset based lending | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	351,696	300,225
Accruing and Nonaccruing Loans and Leases | Asset based lending | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Asset based lending | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Asset based lending | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	68	0
Accruing and Nonaccruing Loans and Leases | Asset based lending | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	68	0
Accruing and Nonaccruing Loans and Leases | Asset based lending | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	351,628	300,225
Accruing and Nonaccruing Loans and Leases | Factoring | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	372,595	363,670
Accruing and Nonaccruing Loans and Leases | Factoring | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Factoring | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Factoring | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Factoring | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Factoring | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	372,595	363,670
Accruing and Nonaccruing Loans and Leases | Lease financing | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	210,692	266,050
Accruing and Nonaccruing Loans and Leases | Lease financing | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	8,265	4,909
Accruing and Nonaccruing Loans and Leases | Lease financing | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,253	3,336
Accruing and Nonaccruing Loans and Leases | Lease financing | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,714	8,401
Accruing and Nonaccruing Loans and Leases | Lease financing | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	12,232	16,646
Accruing and Nonaccruing Loans and Leases | Lease financing | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	198,460	249,404
Accruing and Nonaccruing Loans and Leases | Insurance premium finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	479,754	428,867
Accruing and Nonaccruing Loans and Leases | Insurance premium finance | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,550	1,415
Accruing and Nonaccruing Loans and Leases | Insurance premium finance | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,379	375
Accruing and Nonaccruing Loans and Leases | Insurance premium finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,628	599
Accruing and Nonaccruing Loans and Leases | Insurance premium finance | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	5,557	2,389
Accruing and Nonaccruing Loans and Leases | Insurance premium finance | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	474,197	426,478
Accruing and Nonaccruing Loans and Leases | SBA/USDA | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	359,238	247,756
Accruing and Nonaccruing Loans and Leases | SBA/USDA | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	66
Accruing and Nonaccruing Loans and Leases | SBA/USDA | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	974
Accruing and Nonaccruing Loans and Leases | SBA/USDA | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	987
Accruing and Nonaccruing Loans and Leases | SBA/USDA | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	2,027
Accruing and Nonaccruing Loans and Leases | SBA/USDA | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	359,238	245,729
Accruing and Nonaccruing Loans and Leases | Other commercial finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	159,409	157,908
Accruing and Nonaccruing Loans and Leases | Other commercial finance | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Other commercial finance | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Other commercial finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Other commercial finance | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Other commercial finance | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	159,409	157,908
Accruing and Nonaccruing Loans and Leases | Commercial finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	3,023,673	2,725,495
Accruing and Nonaccruing Loans and Leases | Commercial finance | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	24,881	18,269
Accruing and Nonaccruing Loans and Leases | Commercial finance | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	6,208	7,388
Accruing and Nonaccruing Loans and Leases | Commercial finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	7,868	15,439
Accruing and Nonaccruing Loans and Leases | Commercial finance | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	38,957	41,096
Accruing and Nonaccruing Loans and Leases | Commercial finance | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,984,716	2,684,399
Accruing and Nonaccruing Loans and Leases | Consumer credit products | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	144,353	129,251
Accruing and Nonaccruing Loans and Leases | Consumer credit products | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	3,209	713
Accruing and Nonaccruing Loans and Leases | Consumer credit products | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,558	527
Accruing and Nonaccruing Loans and Leases | Consumer credit products | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,669	511
Accruing and Nonaccruing Loans and Leases | Consumer credit products | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	8,436	1,751
Accruing and Nonaccruing Loans and Leases | Consumer credit products | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	135,917	127,500
Accruing and Nonaccruing Loans and Leases | Other consumer finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	25,306	123,606
Accruing and Nonaccruing Loans and Leases | Other consumer finance | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	113	963
Accruing and Nonaccruing Loans and Leases | Other consumer finance | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	51	285
Accruing and Nonaccruing Loans and Leases | Other consumer finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	124	725
Accruing and Nonaccruing Loans and Leases | Other consumer finance | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	288	1,973
Accruing and Nonaccruing Loans and Leases | Other consumer finance | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	25,018	121,633
Accruing and Nonaccruing Loans and Leases | Consumer finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	169,659	252,857
Accruing and Nonaccruing Loans and Leases | Consumer finance | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	3,322	1,676
Accruing and Nonaccruing Loans and Leases | Consumer finance | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,609	812
Accruing and Nonaccruing Loans and Leases | Consumer finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,793	1,236
Accruing and Nonaccruing Loans and Leases | Consumer finance | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	8,724	3,724
Accruing and Nonaccruing Loans and Leases | Consumer finance | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	160,935	249,133
Accruing and Nonaccruing Loans and Leases | Tax services | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	9,098	10,405
Accruing and Nonaccruing Loans and Leases | Tax services | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Tax services | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Tax services | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	8,873	7,962
Accruing and Nonaccruing Loans and Leases | Tax services | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	8,873	7,962
Accruing and Nonaccruing Loans and Leases | Tax services | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	225	2,443
Accruing and Nonaccruing Loans and Leases | Warehouse finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	326,850	419,926
Accruing and Nonaccruing Loans and Leases | Warehouse finance | 30-59 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Warehouse finance | 60-89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Warehouse finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Warehouse finance | Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Accruing and Nonaccruing Loans and Leases | Warehouse finance | Not Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	326,850	419,926
Accruing and Nonaccruing Loans and Leases | Loans Held for Investment
Financing Receivable, Past Due [Line Items]
Loans and leases	3,529,280	3,607,815
Accruing and Nonaccruing Loans and Leases | Loans Held for Investment | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	28,203	19,945
Accruing and Nonaccruing Loans and Leases | Loans Held for Investment | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	8,817	8,200
Accruing and Nonaccruing Loans and Leases | Loans Held for Investment | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	19,534	24,637
Accruing and Nonaccruing Loans and Leases | Loans Held for Investment | Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	56,554	52,782
Accruing and Nonaccruing Loans and Leases | Loans Held for Investment | Not Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	3,472,726	3,555,033
Nonperforming Loans and Leases
Financing Receivable, Past Due [Line Items]
Loans and leases	29,183	55,932
Non-accrual balance	13,375	34,245
Nonperforming Loans and Leases | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		14,915
Non-accrual balance		14,915
Nonperforming Loans and Leases | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	15,808	21,687
Nonperforming Loans and Leases | Greater Than 89 Days Past Due | Community Banking
Financing Receivable, Past Due [Line Items]
Loans and leases		0
Nonperforming Loans and Leases | Loans held for sale | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Non-accrual balance	0	0
Nonperforming Loans and Leases | Loans held for sale | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Nonperforming Loans and Leases | Term lending | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	9,611	17,462
Non-accrual balance	7,576	14,904
Nonperforming Loans and Leases | Term lending | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,035	2,558
Nonperforming Loans and Leases | Asset based lending | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	68	0
Non-accrual balance	29	0
Nonperforming Loans and Leases | Asset based lending | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	39	0
Nonperforming Loans and Leases | Factoring | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	569	1,268
Non-accrual balance	569	1,268
Nonperforming Loans and Leases | Factoring | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Nonperforming Loans and Leases | Lease financing | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	4,190	11,503
Non-accrual balance	3,750	3,158
Nonperforming Loans and Leases | Lease financing | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	440	8,345
Nonperforming Loans and Leases | Insurance premium finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,628	599
Non-accrual balance	0	0
Nonperforming Loans and Leases | Insurance premium finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,628	599
Nonperforming Loans and Leases | SBA/USDA | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	1,451	987
Non-accrual balance	1,451	0
Nonperforming Loans and Leases | SBA/USDA | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	987
Nonperforming Loans and Leases | Other commercial finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Non-accrual balance	0	0
Nonperforming Loans and Leases | Other commercial finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Nonperforming Loans and Leases | Commercial finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	17,517	31,819
Non-accrual balance	13,375	19,330
Nonperforming Loans and Leases | Commercial finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	4,142	12,489
Nonperforming Loans and Leases | Consumer credit products | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,669	511
Non-accrual balance	0	0
Nonperforming Loans and Leases | Consumer credit products | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,669	511
Nonperforming Loans and Leases | Other consumer finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	124	725
Non-accrual balance	0	0
Nonperforming Loans and Leases | Other consumer finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	124	725
Nonperforming Loans and Leases | Consumer finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,793	1,236
Non-accrual balance	0	0
Nonperforming Loans and Leases | Consumer finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	2,793	1,236
Nonperforming Loans and Leases | Tax services | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	8,873	7,962
Non-accrual balance	0	0
Nonperforming Loans and Leases | Tax services | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	8,873	7,962
Nonperforming Loans and Leases | Warehouse finance | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Non-accrual balance	0	0
Nonperforming Loans and Leases | Warehouse finance | Greater Than 89 Days Past Due | National Lending
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
Nonperforming Loans and Leases | Loans Held for Investment
Financing Receivable, Past Due [Line Items]
Loans and leases	29,183	55,932
Non-accrual balance	13,375	34,245
Nonperforming Loans and Leases | Loans Held for Investment | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 15,808	$ 21,687