Fair Value - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Farmland
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	$ 659	$ 659
Farmland | Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Farmland | Significant Other Observable Inputs (Level 2)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Farmland | Significant Unobservable Inputs (Level 3)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	659	659
Owner-occupied, nonfarm nonresidential properties
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	303	329
Owner-occupied, nonfarm nonresidential properties | Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Owner-occupied, nonfarm nonresidential properties | Significant Other Observable Inputs (Level 2)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Owner-occupied, nonfarm nonresidential properties | Significant Unobservable Inputs (Level 3)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	303	329
Commercial and Industrial
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	2,924	3,680
Commercial and Industrial | Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Commercial and Industrial | Significant Other Observable Inputs (Level 2)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Commercial and Industrial | Significant Unobservable Inputs (Level 3)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	2,924	3,680
Other construction loans and all land development and other land loans
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	1,383	1,790
Other construction loans and all land development and other land loans | Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Other construction loans and all land development and other land loans | Significant Other Observable Inputs (Level 2)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Other construction loans and all land development and other land loans | Significant Unobservable Inputs (Level 3)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	1,383	1,790
Multifamily (5 or more) residential properties
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	717
Multifamily (5 or more) residential properties | Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0
Multifamily (5 or more) residential properties | Significant Other Observable Inputs (Level 2)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0
Multifamily (5 or more) residential properties | Significant Unobservable Inputs (Level 3)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	717
Non-owner occupied, nonfarm nonresidential properties
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	11,539	9,622
Non-owner occupied, nonfarm nonresidential properties | Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Non-owner occupied, nonfarm nonresidential properties | Significant Other Observable Inputs (Level 2)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	0	0
Non-owner occupied, nonfarm nonresidential properties | Significant Unobservable Inputs (Level 3)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions	$ 11,539	9,622
Residential Mortgages secured by first liens
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions		659
Residential Mortgages secured by first liens | Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions		0
Residential Mortgages secured by first liens | Significant Other Observable Inputs (Level 2)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions		0
Residential Mortgages secured by first liens | Significant Unobservable Inputs (Level 3)
Impaired Loans [Abstract]
Obligations (other than securities and leases) of states and political subdivisions		$ 659