SECURITIES - Stratification by Contractual Maturity of Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Amortized Cost
Amortized Cost	$ 1,408,194	$ 1,462,124
Fair Value
Fair Value	1,267,066	1,344,093
Amortized Cost
Amortized Cost	149,764	118,291
Fair Value
Fair Value	136,125	108,118
Debt securities:
Amortized Cost
Due in one year or less	0
Due after one year through five years	11,865
Due after five years through ten years	350,025
Due after ten years	331,709
Amortized Cost	693,599	673,555
Fair Value
Due in one year or less	0
Due after one year through five years	11,757
Due after five years through ten years	331,980
Due after ten years	323,707
Fair Value	667,444	656,202
Amortized Cost
Due in one year or less	2,568
Due after one year through five years	12,399
Due after five years through ten years	1,699
Due after ten years	0
Amortized Cost	16,666	21,159
Fair Value
Due in one year or less	2,559
Due after one year through five years	12,286
Due after five years through ten years	1,701
Due after ten years	0
Fair Value	$ 16,546	$ 21,125