Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest income
Loans	$ 109,227	$ 126,392	$ 342,014	$ 372,156
Investment securities	10,532	11,430	33,359	30,575
Federal funds sold and other	112	377	1,278	1,416
Total interest income	119,871	138,199	376,651	404,147
Interest expense
Deposits	10,011	28,615	50,818	79,507
FHLB advances and other borrowings	2,539	2,538	8,807	6,464
Subordinated debentures and subordinated notes payable	1,070	1,417	3,619	4,177
Total interest expense	13,620	32,570	63,244	90,148
Net interest income	106,251	105,629	313,407	313,999
Provision for loan and lease losses	21,641	26,077	101,539	38,965
Net interest income after provision for loan and lease losses	84,610	79,552	211,868	275,034
Noninterest income
Service charges and other fees	7,731	10,321	28,328	32,219
Wealth management fees	2,773	2,234	8,859	6,592
Mortgage banking income, net	2,422	1,055	5,179	3,366
Net gain (loss) on sale of securities	0	322	0	(191)
Net (decrease) increase in fair value of loans at fair value	(22,118)	16,429	(1,510)	49,662
Net realized and unrealized loss on derivatives	(3,681)	(20,904)	(40,379)	(50,252)
Other	1,190	1,309	3,490	4,313
Total noninterest (loss) income	(11,683)	10,766	3,967	45,709
Noninterest expense
Salaries and employee benefits	39,042	33,899	112,259	103,206
Data processing and communication	5,817	6,234	17,713	17,475
Occupancy and equipment	5,251	4,934	15,941	15,599
Professional fees	7,382	3,923	16,409	11,181
Advertising	750	1,145	2,573	3,299
Net loss on repossessed property and other related expenses	2,475	595	8,508	4,062
Goodwill and intangible assets impairment	0	0	742,352	0
Other	6,332	5,270	16,677	14,864
Total noninterest expense	67,049	56,000	932,432	169,686
Income (loss) before income taxes	5,878	34,318	(716,597)	151,057
Provision for (benefit from) income taxes	478	7,535	(24,653)	33,977
Net income (loss)	$ 5,400	$ 26,783	$ (691,944)	$ 117,080
Basic earnings per common share
Weighted average shares outstanding (in shares)	55,082,621	56,995,007	55,788,751	57,321,561
Earnings per share (in dollars per share)	$ 0.10	$ 0.47	$ (12.40)	$ 2.04
Diluted earnings per common share
Weighted average shares outstanding (in shares)	55,145,619	57,110,103	55,788,751	57,408,023
Diluted earnings per share (in dollars per share)	$ 0.10	$ 0.47	$ (12.40)	$ 2.04
Dividends per share
Dividends paid	$ 8,252	$ 17,081	$ 41,906	$ 45,852
Dividends per share (in dollars per share)	$ 0.15	$ 0.30	$ 0.75	$ 0.80