CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Interest and dividend income:
Loans and leases, including fees	$ 274,528	$ 98,475	$ 52,117
Mortgage-backed securities	11,390	15,479	16,571
Other investments	39,811	44,580	39,415
Total interest and dividend income	325,729	158,534	108,103
Interest expense:
Deposits	46,648	15,163	6,051
FHLB advances and other borrowings	14,874	12,822	8,822
Total interest expense	61,522	27,985	14,873
Net interest income	264,207	130,549	93,230
Provision for loan and lease losses	55,650	29,432	10,589
Net interest income after provision for loan and lease losses	208,557	101,117	82,641
Noninterest income:
Gain (loss) on sale of securities available-for-sale, net (Includes $729, ($8,177), and ($493) reclassified from accumulated other comprehensive income (loss) for net gain (loss) on available for sale securities for the fiscal years ended September 30, 2019, 2018 and 2017, respectively)	729	(8,177)	(493)
Gain on sale of loans and leases	5,244	355	0
Loss on foreclosed real estate	(278)	(19)	(6)
Other income	6,013	1,494	261
Total noninterest income	222,545	184,525	172,172
Noninterest expense:
Compensation and benefits	155,811	109,044	88,728
Refund transfer product expense	7,526	11,750	11,885
Tax advance product expense	3,102	1,817	3,241
Card processing	23,677	26,283	24,130
Occupancy and equipment	28,071	19,740	16,465
Operating lease equipment depreciation	26,181	5,386	0
Legal and consulting	17,310	15,064	8,384
Marketing	1,471	1,226	1,449
Data processing	2,688	2,674	2,117
Intangible amortization	17,711	9,641	12,362
Impairment of Intangible Assets (Excluding Goodwill)	9,660	18	10,248
Other expense	39,952	25,589	20,654
Total noninterest expense	333,160	228,232	199,663
Income before income tax expense	97,942	57,410	55,150
Income tax (benefit) expense (Includes $184, ($2,330), and ($185) reclassified from accumulated other comprehensive income (loss) for the fiscal years ended September 30, 2019, 2018 and 2017, respectively)	(3,374)	5,117	10,233
Net income before noncontrolling interest	101,316	52,293	44,917
Net income attributable to noncontrolling interest	4,312	673	0
Net income attributable to parent	$ 97,004	$ 51,620	$ 44,917
Earnings per common share:
Basic (in dollars per share)	$ 2.49	$ 1.68	$ 1.62
Diluted (in dollars per share)	$ 2.49	$ 1.67	$ 1.61
Refund transfer product fees
Noninterest income:
Noninterest income:	$ 39,198	$ 41,879	$ 38,956
Tax advance product fees
Noninterest income:
Noninterest income:	34,687	35,703	31,913
Total noninterest income	34,687
Card fees
Noninterest income:
Noninterest income:	79,982	94,446	94,707
Total noninterest income	79,982
Rental income
Noninterest income:
Noninterest income:	41,053	7,333	0
Total noninterest income	41,053
Loan and lease fees
Noninterest income:
Noninterest income:	4,292	4,470	3,882
Bank-owned life insurance
Noninterest income:
Noninterest income:	2,535	2,590	2,216
Deposit fees
Noninterest income:
Noninterest income:	$ 9,090	$ 4,451	$ 736