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Deposits - Summary of Balances of Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deposits [Abstract]    
Noninterest-bearing demand $ 3,502,095 $ 2,979,882
Interest-bearing demand 1,718,541 1,568,682
Savings 2,884,378 2,520,959
Time certificates, $250,000 and over 46,350 44,652
Other time certificates 177,649 252,984
Total deposits $ 8,329,013 $ 7,367,159