v3.26.1
SEGMENT REPORTING (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
Segment Reporting [Line Items]          
Number of reportable segments | segment     3    
Segment data [Abstract]          
Interest and dividend income $ 114,033 $ 123,592 $ 366,131 $ 393,952  
Interest expense 1,120 1,279 8,756 10,110  
Net interest income 112,913 122,313 357,375 383,842  
Provision for (reversal of) credit loss 28,309 9,278 77,155 63,205  
Net interest income after provision for credit loss 84,604 113,035 280,220 320,637  
Noninterest income 76,731 73,442 281,674 269,344  
Compensation and benefits 52,361 48,559 159,630 149,755  
Building and software 13,054 10,633 37,835 30,646  
Operating lease equipment depreciation 7,545 11,569 26,615 34,775  
Rate related card expenses 23,253 25,145 72,472 79,149  
Other card expenses 7,418 11,052 22,111 26,601  
Tax product expenses 2,848 2,744 13,545 12,626  
Loan expenses 6,677 3,791 18,620 11,695  
Legal and consulting 6,122 11,094 17,007 22,197  
SG & A intercompany allocations 0 0 0 0  
Consumer lending program expenses 105 4,998 381 14,893  
Other expenses 9,738 9,737 31,574 32,959  
Total noninterest expense 129,121 139,322 399,790 415,296  
Income before income tax expense 32,214 47,155 162,104 174,685  
Total assets 7,314,373 7,229,844 7,314,373 7,229,844 $ 7,172,344
Total goodwill 297,928 297,928 297,928 297,928  
Total deposits 5,950,309 6,005,246 5,950,309 6,005,246  
Consumer          
Segment data [Abstract]          
Interest and dividend income 62,531 69,620 212,144 240,319  
Interest expense 655 1,671 13,193 15,675  
Net interest income 61,876 67,949 198,951 224,644  
Provision for (reversal of) credit loss (6,407) (2,114) 19,481 40,349  
Net interest income after provision for credit loss 68,283 70,063 179,470 184,295  
Noninterest income 48,860 49,748 212,192 197,376  
Compensation and benefits 7,075 7,183 23,748 22,808  
Building and software 2,930 2,414 8,804 7,038  
Operating lease equipment depreciation 0 0 0 0  
Rate related card expenses 23,253 25,145 72,472 79,149  
Other card expenses 7,440 11,042 22,110 26,570  
Tax product expenses 2,848 2,744 13,545 12,626  
Loan expenses 4 3 1,085 1,127  
Legal and consulting 587 657 1,695 1,789  
SG & A intercompany allocations 18,204 17,830 55,261 52,517  
Consumer lending program expenses 105 4,998 381 14,893  
Other expenses 3,602 2,776 12,507 11,290  
Total noninterest expense 66,048 74,792 211,608 229,807  
Income before income tax expense 51,095 45,019 180,054 151,864  
Total assets 328,692 419,654 328,692 419,654  
Total goodwill 87,145 87,145 87,145 87,145  
Total deposits 5,720,403 5,823,684 5,720,403 5,823,684  
Commercial          
Segment data [Abstract]          
Interest and dividend income 82,793 76,738 248,091 224,407  
Interest expense 30,602 25,497 100,705 87,886  
Net interest income 52,191 51,241 147,386 136,521  
Provision for (reversal of) credit loss 34,673 11,371 57,672 22,710  
Net interest income after provision for credit loss 17,518 39,870 89,714 113,811  
Noninterest income 26,214 22,302 65,465 61,659  
Compensation and benefits 10,192 11,090 32,077 36,640  
Building and software 2,428 2,350 7,171 6,974  
Operating lease equipment depreciation 7,545 11,569 26,615 34,775  
Rate related card expenses 0 0 0 0  
Other card expenses 0 0 0 0  
Tax product expenses 0 0 0 0  
Loan expenses 6,673 3,788 17,535 10,568  
Legal and consulting 1,238 993 2,906 2,954  
SG & A intercompany allocations 8,703 7,085 25,460 22,228  
Consumer lending program expenses 0 0 0 0  
Other expenses 1,207 2,447 4,037 6,692  
Total noninterest expense 37,986 39,322 115,801 120,831  
Income before income tax expense 5,746 22,850 39,378 54,639  
Total assets 4,767,308 4,257,971 4,767,308 4,257,971  
Total goodwill 210,783 210,783 210,783 210,783  
Total deposits 177 87 177 87  
Corporate Services/Other          
Segment data [Abstract]          
Interest and dividend income (31,291) (22,766) (94,104) (70,774)  
Interest expense (30,137) (25,889) (105,142) (93,451)  
Net interest income (1,154) 3,123 11,038 22,677  
Provision for (reversal of) credit loss 43 21 2 146  
Net interest income after provision for credit loss (1,197) 3,102 11,036 22,531  
Noninterest income 1,657 1,392 4,017 10,309  
Compensation and benefits 35,094 30,286 103,805 90,307  
Building and software 7,696 5,869 21,860 16,634  
Operating lease equipment depreciation 0 0 0 0  
Rate related card expenses 0 0 0 0  
Other card expenses (22) 10 1 31  
Tax product expenses 0 0 0 0  
Loan expenses 0 0 0 0  
Legal and consulting 4,297 9,444 12,406 17,454  
SG & A intercompany allocations (26,907) (24,915) (80,721) (74,745)  
Consumer lending program expenses 0 0 0 0  
Other expenses 4,929 4,514 15,030 14,977  
Total noninterest expense 25,087 25,208 72,381 64,658  
Income before income tax expense (24,627) (20,714) (57,328) (31,818)  
Total assets 2,218,373 2,552,219 2,218,373 2,552,219  
Total goodwill 0 0 0 0  
Total deposits $ 229,729 $ 181,475 $ 229,729 $ 181,475