Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Unallocated Common Stock of ESOP [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock, at Cost [Member]
Beginning Balance at Jun. 30, 2020	$ 273,713	$ 187	$ 186,200	$ 141,288	$ (11,145)	$ (6,403)	$ (36,414)
Beginning Balance (in shares) at Jun. 30, 2020		16,898,137
Net income	2,728			2,728
Other comprehensive income (loss)	187					187
Common stock dividends declared	(630)			(630)
Repurchase of common stock	(3,449)						(3,449)
Repurchase of common stock (in shares)		(266,900)
Restricted stock awards granted			(60)				60
Restricted stock awards granted (in shares)		3,000
Stock-based compensation	829		829
ESOP shares committed to be released	301		57		244
Ending Balance at Sep. 30, 2020	273,679	$ 187	187,026	143,386	(10,901)	(6,216)	(39,803)
Ending Balance (in shares) at Sep. 30, 2020		16,634,237
Beginning Balance at Jun. 30, 2020	273,713	$ 187	186,200	141,288	(11,145)	(6,403)	(36,414)
Beginning Balance (in shares) at Jun. 30, 2020		16,898,137
Net income	9,014
Other comprehensive income (loss)	223					223
Ending Balance at Mar. 31, 2021	271,297	$ 187	188,926	148,466	(10,418)	(6,180)	(49,684)
Ending Balance (in shares) at Mar. 31, 2021		15,966,216
Beginning Balance at Sep. 30, 2020	273,679	$ 187	187,026	143,386	(10,901)	(6,216)	(39,803)
Beginning Balance (in shares) at Sep. 30, 2020		16,634,237
Net income	2,694			2,694
Other comprehensive income (loss)	271					271
Common stock dividends declared	(608)			(608)
Repurchase of common stock	(7,591)						(7,591)
Repurchase of common stock (in shares)		(517,270)
Shares withheld related to income tax withholding	(303)						(303)
Shares withheld related to income tax withholding (in shares)		(19,100)
Stock-based compensation	822		822
ESOP shares committed to be released	360		116		244
Ending Balance at Dec. 31, 2020	269,324	$ 187	187,964	145,472	(10,657)	(5,945)	(47,697)
Ending Balance (in shares) at Dec. 31, 2020		16,097,867
Net income	3,592			3,592
Other comprehensive income (loss)	(235)					(235)
Common stock dividends declared	(598)			(598)
Repurchase of common stock	(1,987)						(1,987)
Repurchase of common stock (in shares)		(122,933)
Forfeiture of restricted stock (in shares)		(8,718)
Stock-based compensation	809		809
ESOP shares committed to be released	392		153		239
Ending Balance at Mar. 31, 2021	271,297	$ 187	188,926	148,466	(10,418)	(6,180)	(49,684)
Ending Balance (in shares) at Mar. 31, 2021		15,966,216
Beginning Balance at Jun. 30, 2021	274,560	$ 187	189,926	150,987	(10,176)	(3,099)	(53,265)
Beginning Balance (in shares) at Jun. 30, 2021		15,770,645
Net income	3,614			3,614
Other comprehensive income (loss)	(105)					(105)
Common stock dividends declared	(876)			(876)
Repurchase of common stock	(3,720)						(3,720)
Repurchase of common stock (in shares)		(204,261)
Restricted stock awards granted			(145)				145
Restricted stock awards granted (in shares)		8,000
Shares withheld related to income tax withholding	(1)						(1)
Shares withheld related to income tax withholding (in shares)		(74)
Stock-based compensation	810		810
ESOP shares committed to be released	446		202		244
Ending Balance at Sep. 30, 2021	274,728	$ 187	190,793	153,725	(9,932)	(3,204)	(56,841)
Ending Balance (in shares) at Sep. 30, 2021		15,574,310
Beginning Balance at Jun. 30, 2021	274,560	$ 187	189,926	150,987	(10,176)	(3,099)	(53,265)
Beginning Balance (in shares) at Jun. 30, 2021		15,770,645
Net income	11,376
Other comprehensive income (loss)	(2,529)					(2,529)
Ending Balance at Mar. 31, 2022	276,392	$ 187	192,860	159,765	(9,449)	(5,628)	(61,343)
Ending Balance (in shares) at Mar. 31, 2022		15,334,857
Beginning Balance at Sep. 30, 2021	274,728	$ 187	190,793	153,725	(9,932)	(3,204)	(56,841)
Beginning Balance (in shares) at Sep. 30, 2021		15,574,310
Net income	4,288			4,288
Other comprehensive income (loss)	(149)					(149)
Common stock dividends declared	(867)			(867)
Repurchase of common stock	(4,084)						(4,084)
Repurchase of common stock (in shares)		(217,411)
Shares withheld related to income tax withholding	(359)						(359)
Shares withheld related to income tax withholding (in shares)		(18,920)
Stock-based compensation	820		820
ESOP shares committed to be released	457		213		244
Ending Balance at Dec. 31, 2021	274,834	$ 187	191,826	157,146	(9,688)	(3,353)	(61,284)
Ending Balance (in shares) at Dec. 31, 2021		15,337,979
Net income	3,474			3,474
Other comprehensive income (loss)	(2,275)					(2,275)
Common stock dividends declared	(855)			(855)
Repurchase of common stock	(59)						(59)
Repurchase of common stock (in shares)		(3,122)
Stock-based compensation	820		820
ESOP shares committed to be released	453		214		239
Ending Balance at Mar. 31, 2022	$ 276,392	$ 187	$ 192,860	$ 159,765	$ (9,449)	$ (5,628)	$ (61,343)
Ending Balance (in shares) at Mar. 31, 2022		15,334,857