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Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 419,795	$ 407,276
Gross Unrealized Gains	13,504	2,231
Gross Unrealized Losses	(1,066)	(7,317)
Fair Value	432,233	402,190
U.S. Treasury and U.S. government sponsored entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	3,773	6,111
Gross Unrealized Gains	41	0
Gross Unrealized Losses	(3)	(102)
Fair Value	3,811	6,009
State and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	250,905	211,762
Gross Unrealized Gains	10,944	2,075
Gross Unrealized Losses	(424)	(1,893)
Fair Value	261,425	211,944
Mortgage-backed securities - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	145,886	154,130
Gross Unrealized Gains	2,396	84
Gross Unrealized Losses	(372)	(4,167)
Fair Value	147,910	150,047
Collateralized mortgage obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	11,459	21,775
Gross Unrealized Gains	101	72
Gross Unrealized Losses	(213)	(775)
Fair Value	11,347	21,072
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,238	1,206
Gross Unrealized Gains	22	0
Gross Unrealized Losses	0	(18)
Fair Value	1,260	1,188
Small Business Administration
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,534	12,292
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(54)	(362)
Fair Value	$ 6,480	$ 11,930

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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