Borrowed Funds - Short-Term Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Short-Term Debt [Line Items]
Total short-term borrowings	$ 75,224	$ 917,834
Short-term borrowings
Short-Term Debt [Line Items]
FHLB advances	0	850,000
Securities sold under agreements to repurchase	75,224	67,834
Total short-term borrowings	$ 75,224	$ 917,834