Consolidated Statements Of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest and dividend income:
Loans	$ 112,784	$ 97,027	$ 82,456
Taxable	12,040	7,754	7,981
Nontaxable	13,413	13,484	13,686
Total interest and dividend income	138,237	118,265	104,123
Interest expense:
Savings, NOW and money market deposits	12,105	7,113	5,344
Time deposits	10,452	5,479	5,107
Short-term borrowings	4,858	1,345	296
Long-term debt	8,315	7,772	7,255
Total interest expense	35,730	21,709	18,002
Net interest income	102,507	96,556	86,121
Provision (credit) for loan losses	(1,755)	4,854	3,480
Net interest income after provision (credit) for loan losses	104,262	91,702	82,641
Noninterest income:
Investment Management Division income	2,175	2,090	2,000
Service charges on deposit accounts	2,634	2,792	2,666
Net gains (losses) on sales of securities	(10,406)	(1,866)	1,868
Other	7,876	5,145	3,970
Total	2,279	8,161	10,504
Noninterest expense:
Salaries	27,926	25,373	23,258
Employee benefits and other personnel expense	8,539	7,268	6,872
Occupancy and equipment	11,686	10,245	9,264
Debt extinguishment			1,756
Other	11,755	11,966	12,066
Total noninterest expense	59,906	54,852	53,216
Income before income taxes	46,635	45,011	39,929
Income tax expense	5,062	9,889	9,049
Net income	$ 41,573	$ 35,122	$ 30,880
Earnings per share:
Basic	$ 1.64	$ 1.44	$ 1.35
Diluted	1.63	1.43	1.34
Cash dividends declared per share	$ 0.64	$ 0.58	$ 0.55