Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
INTEREST AND DIVIDEND INCOME
Interest and Fees on Loans	$ 95,467	$ 81,647	$ 70,202
Interest on Deposits at Banks	722	711	348
Interest and Dividends on Investment Securities:
Fully Taxable	8,883	8,582	7,884
Exempt from Federal Taxes	4,687	5,563	6,223
Total Interest and Dividend Income	109,759	96,503	84,657
INTEREST EXPENSE
Interest-Bearing Checking Accounts	1,985	1,618	1,510
Savings Deposits	8,399	3,457	1,371
Time Deposits over $250,000	1,932	1,183	282
Other Time Deposits	4,224	1,420	950
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	100	62	44
Federal Home Loan Bank Advances	3,952	3,779	2,083
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	1,019	966	766
Interest on Financing Leases	99	0	0
Total Interest Expense	21,710	12,485	7,006
NET INTEREST INCOME	88,049	84,018	77,651
Provision for Loan Losses	2,079	2,607	2,736
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	85,970	81,411	74,915
NONINTEREST INCOME
Insurance Commissions	7,182	7,888	8,612
Net Gain (Loss) on Securities	289	213	(448)
Net Gain on Sales of Loans	622	135	546
Other Operating Income	1,477	1,324	927
Total Noninterest Income	28,555	28,949	27,645
NONINTEREST EXPENSE
Salaries and Employee Benefits	38,402	38,788	37,677
Occupancy Expenses, Net	5,407	5,026	4,911
Technology and Equipment Expense	13,054	11,284	10,474
FDIC Assessments	157	881	891
Other Operating Expense	10,430	9,076	8,752
Total Noninterest Expense	67,450	65,055	62,705
INCOME BEFORE PROVISION FOR INCOME TAXES	47,075	45,305	39,855
Provision for Income Taxes	9,600	9,026	10,529
NET INCOME	$ 37,475	$ 36,279	$ 29,326
Average Shares Outstanding:
Basic (in shares)	14,940	14,840	14,739
Diluted (in shares)	14,983	14,922	14,838
Per Common Share:
Basic Earnings (in dollars per share)	$ 2.51	$ 2.44	$ 1.99
Diluted Earnings (in dollars per share)	$ 2.50	$ 2.43	$ 1.98
Stock dividend, percent	3.00%	3.00%	3.00%
Fiduciary and Trust
NONINTEREST INCOME
Income From Fiduciary Activities	$ 8,809	$ 9,255	$ 8,417
Deposit Account
NONINTEREST INCOME
Income From Fiduciary Activities	$ 10,176	$ 10,134	$ 9,591