Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 975,002	$ 547,711
Gross Unrealized Gains	26,455	28,395
Gross Unrealized Losses	(5,186)	(506)
Fair Value	996,271	575,600
U.S. Treasury and U.S. government sponsored entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	17,335	11,798
Gross Unrealized Gains	65	101
Gross Unrealized Losses	(318)	(54)
Fair Value	17,082	11,845
State and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	479,933	344,160
Gross Unrealized Gains	22,539	22,350
Gross Unrealized Losses	(951)	(204)
Fair Value	501,521	366,306
Mortgage-backed securities - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	455,303	157,106
Gross Unrealized Gains	3,236	4,919
Gross Unrealized Losses	(3,896)	(243)
Fair Value	454,643	161,782
Collateralized mortgage obligations - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	13,795	25,654
Gross Unrealized Gains	381	742
Gross Unrealized Losses	(4)	(3)
Fair Value	14,172	26,393
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	3,909	3,582
Gross Unrealized Gains	86	132
Gross Unrealized Losses	(17)	(2)
Fair Value	3,978	3,712
Small Business Administration
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	4,727	5,411
Gross Unrealized Gains	148	151
Gross Unrealized Losses	0	0
Fair Value	$ 4,875	$ 5,562