SECURITIES - Securities Available for Sale (Detail) - USD ($)	Mar. 31, 2023	Jun. 30, 2022
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 1,408,194,000	$ 1,462,124,000
Gross Unrealized Gains	899,000	260,000
Gross Unrealized Losses	142,027,000	118,291,000
Allowance for Credit Losses	0	0
Fair Value	1,267,066,000	1,344,093,000
Debt securities:
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	693,599,000	673,555,000
Gross Unrealized Gains	194,000	214,000
Gross Unrealized Losses	26,349,000	17,567,000
Allowance for Credit Losses	0	0
Fair Value	667,444,000	656,202,000
Obligations of state and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		28,485,000
Gross Unrealized Gains		39,000
Gross Unrealized Losses		89,000
Allowance for Credit Losses		0
Fair Value		28,435,000
Asset-backed securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	145,616,000	169,506,000
Gross Unrealized Gains	22,000	0
Gross Unrealized Losses	2,585,000	2,949,000
Allowance for Credit Losses	0	0
Fair Value	143,053,000	166,557,000
Collateralized loan obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	388,265,000	315,693,000
Gross Unrealized Gains	172,000	0
Gross Unrealized Losses	6,500,000	7,880,000
Allowance for Credit Losses	0	0
Fair Value	381,937,000	307,813,000
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	159,718,000	159,871,000
Gross Unrealized Gains	0	175,000
Gross Unrealized Losses	17,264,000	6,649,000
Allowance for Credit Losses	0	0
Fair Value	142,454,000	153,397,000
Mortgage-backed securities:
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	714,595,000	788,569,000
Gross Unrealized Gains	705,000	46,000
Gross Unrealized Losses	115,678,000	100,724,000
Allowance for Credit Losses	0	0
Fair Value	599,622,000	687,891,000
Collateralized mortgage obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		7,451,000
Gross Unrealized Gains		0
Gross Unrealized Losses		329,000
Allowance for Credit Losses		0
Fair Value		7,122,000
Residential pass-through securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	549,550,000	595,337,000
Gross Unrealized Gains	11,000	45,000
Gross Unrealized Losses	98,320,000	80,624,000
Allowance for Credit Losses	0	0
Fair Value	451,241,000	514,758,000
Commercial pass-through securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	165,045,000	185,781,000
Gross Unrealized Gains	694,000	1,000
Gross Unrealized Losses	17,358,000	19,771,000
Allowance for Credit Losses	0	0
Fair Value	$ 148,381,000	$ 166,011,000