CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Shares outstanding	18,926,810
Common stock options exercised and related tax benefits, shares	19,860
Issuance of shares for Employee Stock Purchase Plan, shares	56,849	18,740	29,273
Share repurchase, share	(220,222)	(739,778)
Shares outstanding	18,974,703	18,926,810
Common Stock [Member]
Shares outstanding	18,926,810	19,337,662	18,619,634
Restricted stock units issued, shares	170,575	144,026	90,771
Restricted stock forfeitures, shares			(94,034)
Restricted stock units/awards repurchased on vesting to pay taxes, shares	(43,935)	(40,197)	(45,404)
Cash dividends declared on common stock, per share	$ 0.20	$ 0.20	$ 0.20
Common stock options exercised and related tax benefits, shares	19,860	18,660	23,148
Common stock options exercised, used to exercise, shares	2,149		2,374
Common stock options exercised, net of shares used to exercise, shares	17,711		20,774
Sales of shares (Dividend Reinvestment Program), shares			542,302
Issuance of shares for Employee Stock Purchase Plan, shares	56,849	18,740	29,273
Share repurchase, share	(220,222)	(739,778)
Issuance of shares for Employee's Savings and Investment plan, shares			34,449
Issuance of common stock for acquisition, shares	60,384	184,806	139,897
Exercise of warrants, shares	20,000	7,109
Exercise of warrants, used to exercise, shares	13,469	4,218
Exercise of warrants, net of shares used to exercise, shares	6,531	2,891
Shares outstanding	18,974,703	18,926,810	19,337,662