CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
INTEREST INCOME
Loans, including fees	$ 9,810	$ 7,687
Securities:
Taxable	747	777
Tax-exempt	970	801
Dividend income	121	90
Interest-bearing deposits with banks	153	71
Total interest income	11,801	9,426
INTEREST EXPENSE
Deposits	1,424	862
Repurchase agreements	1	1
Borrowings from Federal Home Loan Bank	478	510
Other borrowings	322	0
Total interest expense	2,225	1,373
Net interest income	9,576	8,053
Provision for loan losses	315	462
Net interest income after provision for loan losses	9,261	7,591
NONINTEREST INCOME
ATM and interchange fees	453	363
Net gain on trading account securities	0	150
Net gain on sales of loans, Small Business Administration	964	1,539
Mortgage banking income	3,289	115
Increase in cash surrender value of life insurance	111	107
Real estate lease income	158	0
Net gain on sale of premises and equipment	1	7
Other income	237	120
Total noninterest income	5,781	2,906
NONINTEREST EXPENSE
Compensation and benefits	7,257	4,011
Occupancy and equipment	1,325	742
Data processing	427	347
Advertising	396	117
Professional fees	460	373
FDIC insurance premiums	66	119
Net gain on other real estate owned	(21)	(156)
Other operating expenses	1,506	829
Total noninterest expense	11,416	6,382
Income before income taxes	3,626	4,115
Income tax expense (benefit)	522	622
Net Income	3,104	3,493
Less: net income attributable to noncontrolling interests	173	87
Net Income Attributable to First Savings Financial Group, Inc.	$ 2,931	$ 3,406
Net income per share:
Basic	$ 1.28	$ 1.53
Diluted	$ 1.24	$ 1.44
Weighted average shares outstanding:
Basic	2,284,665	2,228,256
Diluted	2,371,480	2,358,935
Dividends per share	$ 0.15	$ 0.14
Deposit Account [Member]
NONINTEREST INCOME
Revenue from Contract with Customer	$ 511	$ 377
Financial Service, Other [Member]
NONINTEREST INCOME
Revenue from Contract with Customer	$ 57	$ 128