Fair Value - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Non Recurring - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Farmland
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	$ 920	$ 659
Farmland | Quoted Prices in Active Markets for Identical Assets (Level 1)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Farmland | Significant Other Observable Inputs (Level 2)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Farmland | Significant Unobservable Inputs (Level 3)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	920	659
Owner-occupied, nonfarm nonresidential properties
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	194	329
Owner-occupied, nonfarm nonresidential properties | Quoted Prices in Active Markets for Identical Assets (Level 1)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Owner-occupied, nonfarm nonresidential properties | Significant Other Observable Inputs (Level 2)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Owner-occupied, nonfarm nonresidential properties | Significant Unobservable Inputs (Level 3)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	194	329
Commercial and Industrial
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	3,102	3,680
Commercial and Industrial | Quoted Prices in Active Markets for Identical Assets (Level 1)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Commercial and Industrial | Significant Other Observable Inputs (Level 2)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Commercial and Industrial | Significant Unobservable Inputs (Level 3)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	3,102	3,680
Other construction loans and all land development and other land loans
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	248	1,790
Other construction loans and all land development and other land loans | Quoted Prices in Active Markets for Identical Assets (Level 1)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Other construction loans and all land development and other land loans | Significant Other Observable Inputs (Level 2)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Other construction loans and all land development and other land loans | Significant Unobservable Inputs (Level 3)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	248	1,790
Multifamily (5 or more) residential properties
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	627	0
Multifamily (5 or more) residential properties | Quoted Prices in Active Markets for Identical Assets (Level 1)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Multifamily (5 or more) residential properties | Significant Other Observable Inputs (Level 2)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Multifamily (5 or more) residential properties | Significant Unobservable Inputs (Level 3)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	627	0
Non-owner occupied, nonfarm nonresidential properties
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	2,889	9,622
Non-owner occupied, nonfarm nonresidential properties | Quoted Prices in Active Markets for Identical Assets (Level 1)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Non-owner occupied, nonfarm nonresidential properties | Significant Other Observable Inputs (Level 2)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	0	0
Non-owner occupied, nonfarm nonresidential properties | Significant Unobservable Inputs (Level 3)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens	$ 2,889	9,622
Residential Mortgages secured by first liens
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens		659
Residential Mortgages secured by first liens | Quoted Prices in Active Markets for Identical Assets (Level 1)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens		0
Residential Mortgages secured by first liens | Significant Other Observable Inputs (Level 2)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens		0
Residential Mortgages secured by first liens | Significant Unobservable Inputs (Level 3)
Collateral-dependent/Impaired loans:
Residential mortgages secured by first liens		$ 659