Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Interest and dividend income:
Loans and leases, including fees		$ 60,498	$ 16,443
Mortgage-backed securities		2,698	3,758
Other investments		11,780	10,656
Total interest and dividend income		74,976	30,857
Interest expense:
Deposits		10,596	1,885
FHLB advances and other borrowings		4,108	2,776
Total interest expense		14,704	4,661
Net interest income		60,272	26,196
Provision for loan and lease losses		9,099	1,068
Net interest income after provision for loan and lease losses		51,173	25,128
Noninterest income:
Bank-owned life insurance		642	669
Loss on sale of securities available-for-sale, net (Includes ($22) and ($1,010) reclassified from accumulated other comprehensive income (loss) for net gains (losses) on available for sale securities for the three months ended December 31, 2018 and 2017, respectively)		(22)	(1,010)
Gain on sale of loans and leases		867	0
Gain (loss) on foreclosed real estate		15	(19)
Other income		877	102
Total noninterest income		37,751	29,268
Noninterest expense:
Compensation and benefits		33,010	22,340
Refund transfer product expense		10	101
Tax advance product expense		452	280
Card processing		7,085	6,540
Occupancy and equipment		6,458	4,890
Operating lease equipment depreciation		7,765	0
Legal and consulting		3,969	2,416
Marketing		539	553
Data processing		437	414
Intangible amortization		4,383	1,681
Other expense		10,187	4,827
Total noninterest expense		74,295	44,042
Income before income tax expense		14,629	10,354
Income tax (benefit) expense (Includes ($5) and ($380) reclassified from accumulated other comprehensive loss for the three months ended December 31, 2018 and 2017, respectively)		(1,691)	5,684
Net income before noncontrolling interest		16,320	4,670
Net income attributable to noncontrolling interest		922	0
Net income attributable to parent		$ 15,398	$ 4,670
Earnings per common share
Basic (in dollars per share)	[1]	$ 0.39	$ 0.16
Diluted (in dollars per share)	[1]	$ 0.39	$ 0.16
Refund transfer product fees
Noninterest income:
Revenue from contract with customer		$ 261	$ 192
Tax advance product fees
Noninterest income:
Revenue from contract with customer		1,685	1,947
Card fees
Noninterest income:
Revenue from contract with customer		19,351	25,247
Rental Income [Member]
Noninterest income:
Revenue from contract with customer		10,890	0
Total noninterest income		10,890	0
Loan and lease fees
Noninterest income:
Revenue from contract with customer		1,247	1,292
Deposit fees
Noninterest income:
Revenue from contract with customer		$ 1,938	$ 848

[1] All share and per share data has been adjusted to reflect the 3-for-1 forward stock split effected by the Company on October 4, 2018.