Deposits - Schedule of Deposits (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Deposits [Abstract]
Non-interest bearing demand: Amount	$ 653,899	$ 593,718
Interest-bearing demand: Amount	2,265,597	1,902,478
Savings: Amount	1,053,198	1,111,364
Certificates of deposit: Amount	1,889,562	1,877,746
Total deposits	$ 5,862,256	$ 5,485,306
Non-interest-bearing demand, Weighted Average Interest Rate	0.00%	0.00%
Interest-bearing demand, Weighted Average Interest Rate	0.56%	0.18%
Savings, Weighted Average Interest Rate	0.17%	0.13%
Certificates of deposit, Weighted Average Interest Rate	0.80%	0.57%
Total deposits, Weighted Average Interest Rate	0.50%	0.28%