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Investment Securities (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Apr. 01, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Investment securities available-for-sale
Amortized Cost			$ 649,327		$ 578,138
Unrealized Gains			8,505		14,749
Unrealized Losses			(6,286)		(545)
Fair Value			651,546		592,342
Amortized Cost			147,466
Net Unrealized Gains			1,150
Carrying Value			146,316
Unrealized Gains			1,974
Unrealized Losses			(5)
Fair Value			148,285
Reclassification adjustment for losses (gains) realized in income		$ 1,294	114	$ 1,294
U. S. Treasury and agencies
Investment securities available-for-sale
Amortized Cost			5,570		5,926
Unrealized Gains			90
Unrealized Losses					(19)
Fair Value			5,660		5,907
Obligations of state and political agencies
Investment securities available-for-sale
Amortized Cost					148,491
Unrealized Gains					5,282
Fair Value					153,773
Amortized Cost			147,466
Net Unrealized Gains			1,150
Carrying Value			146,316
Unrealized Gains			1,974
Unrealized Losses			(5)
Fair Value			148,285
Fair value of debt securities available-for-sale transferred to held-to-maturity	$ 149,200
Reclassification adjustment for losses (gains) realized in income	$ 1,300
Mortgage backed securities - Residential agency
Investment securities available-for-sale
Amortized Cost			512,904		303,760
Unrealized Gains			2,961		3,395
Unrealized Losses			(6,022)		(436)
Fair Value			509,843		306,719
Mortgage backed securities - Commercial
Investment securities available-for-sale
Amortized Cost			95,744		89,300
Unrealized Gains			4,344		5,678
Fair Value			100,088		94,978
Asset backed securities
Investment securities available-for-sale
Amortized Cost			69		109
Unrealized Gains			3		6
Fair Value			72		115
Corporate bonds
Investment securities available-for-sale
Amortized Cost			35,040		30,552
Unrealized Gains			1,107		388
Unrealized Losses			(264)		(90)
Fair Value			$ 35,883		$ 30,850

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