Securities - Fair Value and Amortized Cost of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair Value
Pledge securities for borrowing availability at the Federal Reserve	$ 832,429	$ 851,384
Pledge securities for FHLB borrowings	280,180	279,136
Amortized Cost
Pledge securities for borrowing availability at the Federal Reserve	1,026,315	1,032,916
Pledge securities for FHLB borrowings	$ 327,837	$ 333,613