Securities, Gains (Loss) on Securities, Securities Pledged, and Securities Sold Under Agreements to Repurchase (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) Security	Sep. 30, 2019 USD ($) Security	Sep. 30, 2020 USD ($) Security	Sep. 30, 2019 USD ($) Security	Dec. 31, 2019 USD ($)
Gains (Loss) on Sales of Securities [Abstract}
Net securities gain	$ 142	$ 14	$ 1,328	$ 574
Realized pre-tax gain on sales and calls of AFS securities	23		1,000	4
Realized pre-tax loss on sales and calls of AFS securities		(2)
Unrealized gain from fair market value adjustment of equity securities	119	16	259	$ 570
Equity securities at fair value	2,212		2,212		$ 1,953
Securities pledged as collateral to secure public deposit and for other purposes	348,400		348,400		239,100
Amortized cost of securities sold under agreements to repurchase	383,200		383,200		$ 261,500
Visa Class B Restricted Stock [Member]
Gains (Loss) on Sales of Securities [Abstract}
Equity securities at fair value	2,200		$ 2,200
Increase (Decrease) in fair market value of equity securities	$ 100	$ 16
Number of equity securities sold (in shares) | Security	0	0	0	0