Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect Period Of Adoption Adjustment [Member]	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect Period Of Adoption Adjustment [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance (in value) at Jun. 30, 2019	$ 1,127,159		$ 891	$ 787,394	$ 366,679		$ (30,644)	$ 2,839
Balance (in shares) at Jun. 30, 2019			89,126
Net Income	44,965				44,965
Other comprehensive income, net of income tax	(1,582)							(1,582)
Accretion Amortization Of ESOP Award	$ 2,354			409			1,945
Stock option exercise (in shares)	0
Sock repurchases (in value)	$ (69,782)		$ (53)	(69,729)
Stock repurchases (in shares)			(5,376)
Stock-based compensation expense	5,879			5,879
Cancellation of stock issued for restricted stock awards (in value)	(1,083)		$ (1)	(1,082)
Cancellation of stock issued for restricted stock awards (in shares)			(87)
Cash dividends declared	(23,733)				(23,733)
Balance (in value) at Jun. 30, 2020	1,084,177		$ 837	722,871	387,911		(28,699)	1,257
Balance (in shares) at Jun. 30, 2020			83,663
Cumulative effect of change in accounting principle - Topic 326 at Jun. 30, 2020		$ (14,239)				$ (14,239)
Balance - July 1, as adjusted for change in accounting principle at Jun. 30, 2020	1,069,938		$ 837	722,871	373,672		(28,699)	1,257
Net Income	63,233				63,233
Other comprehensive income, net of income tax	4,887							4,887
Accretion Amortization Of ESOP Award	2,069			123			1,946
Stock option exercise (in value)	$ 373			373
Stock option exercise (in shares)	41,412		41
Sock repurchases (in value)	$ (119,021)		$ (105)	(118,916)
Stock repurchases (in shares)			(10,567)
Issuance of shares under stock benefit plans (in value)			$ 1	(1)
Issuance of shares under stock benefit plan (in shares)			54
Stock-based compensation expense	5,673			5,673
Cancellation of stock issued for restricted stock awards (in value)	(803)		$ (1)	(802)
Cancellation of stock issued for restricted stock awards (in shares)			(80)
Acquisition of MSB Financial Corp (in value)	45,133		$ 58	45,075
Acquisition of MSB Financial Corp (in shares)			5,854
Cash dividends declared	(28,538)				(28,538)
Balance (in value) at Jun. 30, 2021	$ 1,042,944		$ 790	654,396	408,367		(26,753)	6,144
Balance (in shares) at Jun. 30, 2021	78,964,859		78,965
Net Income	$ 67,547				67,547
Other comprehensive income, net of income tax	(61,871)							(61,871)
Accretion Amortization Of ESOP Award	$ 2,546			600			1,946
Stock option exercise (in shares)	0
Sock repurchases (in value)	$ (129,520)		$ (102)	(129,418)
Stock repurchases (in shares)			(10,222)
Stock-based compensation expense	3,794			3,794
Cancellation of stock issued for restricted stock awards (in value)	(977)		$ (1)	(976)
Cancellation of stock issued for restricted stock awards (in shares)			(77)
Cash dividends declared	(30,463)				(30,463)
Balance (in value) at Jun. 30, 2022	$ 894,000		$ 687	$ 528,396	$ 445,451		$ (24,807)	$ (55,727)
Balance (in shares) at Jun. 30, 2022	68,666,323		68,666