Securities - Exposure to Investment Securities Issuers that Exceeded 10% of Shareholder's Equity (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Concentration Risk [Line Items]
Amortized Cost	$ 404,123	$ 451,526
Stockholders' Equity, Total
Concentration Risk [Line Items]
Amortized Cost	318,462
Fair Value	256,587
Stockholders' Equity, Total | U.S. Treasuries
Concentration Risk [Line Items]
Amortized Cost	50,048
Fair Value	49,830
Stockholders' Equity, Total | Long-term Advances from FHLB
Concentration Risk [Line Items]
Amortized Cost	32,196
Fair Value	26,109
Stockholders' Equity, Total | Federal Home Loan Mortgage Corporation (Freddie Mac-FHLMC)
Concentration Risk [Line Items]
Amortized Cost	97,488
Fair Value	69,941
Stockholders' Equity, Total | Federal Farm Credit Bank (FFCB)
Concentration Risk [Line Items]
Amortized Cost	138,730
Fair Value	$ 110,707