Borrowed Funds (Scheduled of FHLB Advances) (Detail) - USD ($) $ in Thousands |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Debt Disclosure [Abstract] | ||
| Due in one year or less | $ 1,708,290 | |
| Due after one year through two years | 157,445 | |
| Due after two years through three years | 353,162 | |
| Due after three years through four years | 0 | |
| Thereafter | 0 | |
| Purchase accounting adjustment on borrowed funds | 3,162 | $ 3,714 |
| Total FHLBNY advances and overnight borrowings | $ 2,222,059 |