Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
INTEREST AND DIVIDEND INCOME:
Loans receivable	$ 69,914	$ 70,772
Mortgage-backed securities (MBS)	6,102	6,523
FHLB stock	1,826	1,971
Investment securities	1,507	1,441
Cash and cash equivalents	687	1,714
Total interest and dividend income	80,036	82,421
INTEREST EXPENSE:
Deposits	17,962	15,725
Borrowings	13,377	14,395
Total interest expense	31,339	30,120
NET INTEREST INCOME	48,697	52,301
PROVISION FOR CREDIT LOSSES	225	0
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	48,472	52,301
NON-INTEREST INCOME:
Revenue from contracts with customers	4,000	4,300
Other non-interest income	1,751	1,446
Total non-interest income	5,504	5,424
NON-INTEREST EXPENSE:
Salaries and employee benefits	13,471	12,962
Information technology and related expense	4,141	4,599
Occupancy, net	3,207	3,252
Advertising and promotional	1,410	760
Regulatory and outside services	1,343	1,766
Deposit and loan transaction costs	711	736
Office supplies and related expense	519	459
Federal insurance premium	0	528
Other non-interest expense	1,698	1,720
Total non-interest expense	26,500	26,782
INCOME BEFORE INCOME TAX EXPENSE	27,476	30,943
INCOME TAX EXPENSE	4,965	6,560
NET INCOME	$ 22,511	$ 24,383
Basic earnings per share (EPS)	$ 0.16	$ 0.18
Diluted EPS	$ 0.16	$ 0.18
Basic weighted average common shares	137,898,010	137,550,920
Diluted weighted average common shares	137,976,122	137,592,379
Deposit service fees [Member]
NON-INTEREST INCOME:
Revenue from contracts with customers	$ 3,062	$ 3,352
Insurance commissions [Member]
NON-INTEREST INCOME:
Revenue from contracts with customers	$ 691	$ 626