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Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 790,294	$ 547,711
Gross Unrealized Gains	19,970	28,395
Gross Unrealized Losses	(7,398)	(506)
Fair Value	802,866	575,600
U.S. Treasury and U.S. government sponsored entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	17,356	11,798
Gross Unrealized Gains	79	101
Gross Unrealized Losses	(370)	(54)
Fair Value	17,065	11,845
State and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	447,203	344,160
Gross Unrealized Gains	15,903	22,350
Gross Unrealized Losses	(2,689)	(204)
Fair Value	460,417	366,306
Mortgage-backed securities - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	301,457	157,106
Gross Unrealized Gains	3,366	4,919
Gross Unrealized Losses	(4,301)	(243)
Fair Value	300,522	161,782
Collateralized mortgage obligations - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	15,499	25,654
Gross Unrealized Gains	440	742
Gross Unrealized Losses	(4)	(3)
Fair Value	15,935	26,393
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	3,679	3,582
Gross Unrealized Gains	92	132
Gross Unrealized Losses	(34)	(2)
Fair Value	3,737	3,712
Small Business Administration
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	5,100	5,411
Gross Unrealized Gains	90	151
Gross Unrealized Losses	0	0
Fair Value	$ 5,190	$ 5,562

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