Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Statement Of Financial Position [Abstract]
Held to maturity investment securities, fair value	$ 379,500	$ 342,137
Allowance for loan losses	$ 8,711	$ 7,881
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	10,000,000	10,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares, issued	18,703,577	18,703,577
Common Stock, shares outstanding	15,334,857	15,770,645
Treasury Stock, Shares	3,368,720	2,932,932