Securities - Fair Value and Amortized Cost of Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value
Pledge securities for borrowing availability at the Federal Reserve	$ 849,709	$ 851,384
Pledge securities for FHLB borrowings	297,446	279,136
Amortized Cost
Pledge securities for borrowing availability at the Federal Reserve	1,042,168	1,032,916
Pledge securities for FHLB borrowings	$ 345,111	$ 333,613