Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
INTEREST AND DIVIDEND INCOME:
Loans receivable	$ 56,886	$ 54,779	$ 168,086	$ 172,758
Mortgage-backed securities ("MBS")	5,048	5,360	14,494	16,499
FHLB stock	2,695	944	6,166	2,964
Cash and cash equivalents	3,968	26	4,931	117
Investment securities	815	763	2,423	2,075
Total interest and dividend income	69,412	61,872	196,100	194,413
INTEREST EXPENSE:
Borrowings	11,644	7,826	27,961	26,885
Deposits	7,787	11,475	25,443	38,071
Total interest expense	19,431	19,301	53,404	64,956
NET INTEREST INCOME	49,981	42,571	142,696	129,457
Provision for credit losses	937	(2,691)	(5,690)	(7,187)
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	49,044	45,262	148,386	136,644
NON-INTEREST INCOME:
Gain on sale of Visa Class B shares	0	0	0	7,386
Other non-interest income	1,726	1,286	4,664	4,160
Total non-interest income	6,115	5,236	17,037	22,783
NON-INTEREST EXPENSE:
Salaries and employee benefits	14,581	13,867	42,332	41,402
Information technology and related expense	4,343	4,736	13,268	13,568
Occupancy, net	3,721	3,504	10,593	10,406
Regulatory and outside services	1,572	1,469	4,212	4,288
Advertising and promotional	1,068	1,407	3,626	3,729
Federal insurance premium	784	633	2,200	1,888
Deposit and loan transaction costs	664	693	2,050	2,123
Office supplies and related expense	494	402	1,464	1,289
Loss on interest rate swap termination	0	0	0	4,752
Other non-interest expense	1,163	891	3,299	3,877
Total non-interest expense	28,390	27,602	83,044	87,322
INCOME BEFORE INCOME TAX EXPENSE	26,769	22,896	82,379	72,105
INCOME TAX EXPENSE	5,617	4,709	17,418	14,576
NET INCOME	$ 21,152	$ 18,187	$ 64,961	$ 57,529
Basic earnings per share ("EPS")	$ 0.16	$ 0.13	$ 0.48	$ 0.42
Diluted EPS	$ 0.16	$ 0.13	$ 0.48	$ 0.42
Basic weighted average common shares	135,724,658	135,504,869	135,675,959	135,450,951
Diluted weighted average common shares	135,724,658	135,537,152	135,675,959	135,477,566
Deposit service fees [Member]
NON-INTEREST INCOME:
Revenue from contracts with customers	$ 3,601	$ 3,227	$ 10,331	$ 8,988
Insurance commissions [Member]
NON-INTEREST INCOME:
Revenue from contracts with customers	$ 788	$ 723	$ 2,042	$ 2,249