v3.25.1
Borrowed Funds (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Debt Instrument [Line Items]      
Other long-term debt $ 510,600   $ 513,900
Other short-term borrowings 1,830,000   1,510,000
Available for sale debt securities, at fair value 2,878,785   2,768,915
Interest expense, borrowings 18,300 $ 17,400  
Amortization related to purchase accounting on FHLB advances (552) $ (15)  
Asset Pledged as Collateral | Securities Sold under Agreements to Repurchase      
Debt Instrument [Line Items]      
Available for sale debt securities, at fair value $ 1,190,000   $ 1,120,000