Securities - Fair Value and Amortized Cost of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Fair Value
Pledge securities for borrowing availability at the Federal Reserve	$ 851,384	$ 1,441,920
Pledge securities for FHLB borrowings	279,136	0
Amortized Cost [Abstract]
Pledge securities for borrowing availability at the Federal Reserve	1,032,916	1,682,935
Pledge securities for FHLB borrowings	$ 333,613	$ 0