SECURITIES - Schedule of Fair Values and Gross Unrealized and Unrecognized Losses on Investments (Detail) $ in Thousands	Mar. 31, 2023 USD ($) Security	Jun. 30, 2022 USD ($) Security
Fair Value
Less than 12 Months	$ 123,163	$ 847,082
12 Months or More	1,006,879	456,929
Fair Value	1,130,042	1,304,011
Unrealized Losses
Less than 12 Months	3,018	46,005
12 Months or More	$ 139,009	$ 72,286
Number of Securities | Security	186	229
Unrealized Losses	$ 142,027	$ 118,291
Fair Value
Less than 12 Months	13,434	95,674
12 Months or More	82,100	0
Fair Value	95,534	95,674
Unrecognized Losses
Less than 12 Months	95	10,217
12 Months or More	$ 13,668	$ 0
Number of Securities | Security	41	24
Unrecognized Losses	$ 13,763	$ 10,217
Obligations of state and political subdivisions
Fair Value
Less than 12 Months		11,310
12 Months or More		0
Fair Value		11,310
Unrealized Losses
Less than 12 Months		89
12 Months or More		$ 0
Number of Securities | Security		30
Unrealized Losses		$ 89
Fair Value
Less than 12 Months	13,434	8,681
12 Months or More	2,109	0
Fair Value	15,543	8,681
Unrecognized Losses
Less than 12 Months	95	78
12 Months or More	$ 35	$ 0
Number of Securities | Security	32	15
Unrecognized Losses	$ 130	$ 78
Asset-backed securities
Fair Value
Less than 12 Months	22,203	161,303
12 Months or More	104,001	5,254
Fair Value	126,204	166,557
Unrealized Losses
Less than 12 Months	289	2,928
12 Months or More	$ 2,296	$ 21
Number of Securities | Security	14	15
Unrealized Losses	$ 2,585	$ 2,949
Collateralized loan obligations
Fair Value
Less than 12 Months	33,732	236,967
12 Months or More	277,809	70,846
Fair Value	311,541	307,813
Unrealized Losses
Less than 12 Months	381	6,435
12 Months or More	$ 6,119	$ 1,445
Number of Securities | Security	25	24
Unrealized Losses	$ 6,500	$ 7,880
Corporate bonds
Fair Value
Less than 12 Months	38,792	129,407
12 Months or More	103,662	3,815
Fair Value	142,454	133,222
Unrealized Losses
Less than 12 Months	1,695	6,464
12 Months or More	$ 15,569	$ 185
Number of Securities | Security	31	27
Unrealized Losses	$ 17,264	$ 6,649
Collateralized mortgage obligations
Fair Value
Less than 12 Months		7,122
12 Months or More		0
Fair Value		7,122
Unrealized Losses
Less than 12 Months		329
12 Months or More		$ 0
Number of Securities | Security		6
Unrealized Losses		$ 329
Commercial pass-through securities
Fair Value
Less than 12 Months	17,754	63,045
12 Months or More	81,590	102,817
Fair Value	99,344	165,862
Unrealized Losses
Less than 12 Months	107	3,194
12 Months or More	$ 17,251	$ 16,577
Number of Securities | Security	10	21
Unrealized Losses	$ 17,358	$ 19,771
Fair Value
Less than 12 Months	0	10,729
12 Months or More	10,266	0
Fair Value	10,266	10,729
Unrecognized Losses
Less than 12 Months	0	1,552
12 Months or More	$ 1,991	$ 0
Number of Securities | Security	1	1
Unrecognized Losses	$ 1,991	$ 1,552
Residential pass-through securities
Fair Value
Less than 12 Months	10,682	237,928
12 Months or More	439,817	274,197
Fair Value	450,499	512,125
Unrealized Losses
Less than 12 Months	546	26,566
12 Months or More	$ 97,774	$ 54,058
Number of Securities | Security	106	106
Unrealized Losses	$ 98,320	$ 80,624
Fair Value
Less than 12 Months	0	76,264
12 Months or More	69,725	0
Fair Value	69,725	76,264
Unrecognized Losses
Less than 12 Months	0	8,587
12 Months or More	$ 11,642	$ 0
Number of Securities | Security	8	8
Unrecognized Losses	$ 11,642	$ 8,587