Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
INTEREST AND DIVIDEND INCOME
Interest and Fees on Loans	$ 62,823	$ 56,856	$ 53,194
Interest on Deposits at Banks	152	94	80
Interest and Dividends on Investment Securities:
Fully Taxable	7,934	8,043	7,954
Exempt from Federal Taxes	6,006	5,745	5,633
Total Interest and Dividend Income	76,915	70,738	66,861
INTEREST EXPENSE
Interest-Bearing Checking Accounts	1,280	1,276	1,722
Savings Deposits	932	741	839
Time Deposits of $100,000 or More	453	356	770
Other Time Deposits	658	742	1,354
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	33	20	22
Federal Home Loan Bank Advances	1,340	1,097	490
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	660	581	570
Total Interest Expense	5,356	4,813	5,767
NET INTEREST INCOME	71,559	65,925	61,094
Provision for Loan Losses	2,033	1,347	1,848
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	69,526	64,578	59,246
NONINTEREST INCOME
Income From Fiduciary Activities	7,783	7,762	7,468
Fees for Other Services to Customers	9,469	9,220	9,261
Net (Loss) Gain on Securities Transactions	(22)	129	110
Insurance Commissions	8,668	8,967	9,455
Net Gain on Sales of Loans	821	692	784
Other Operating Income	1,113	1,354	1,238
Total Noninterest Income	27,832	28,124	28,316
NONINTEREST EXPENSE
Salaries and Employee Benefits	34,330	33,064	30,941
Occupancy Expenses, Net	9,402	9,267	8,990
FDIC Assessments	1,076	1,186	1,117
Other Operating Expense	14,801	13,913	12,980
Total Noninterest Expense	59,609	57,430	54,028
INCOME BEFORE PROVISION FOR INCOME TAXES	37,749	35,272	33,534
Provision for Income Taxes	11,215	10,610	10,174
NET INCOME	$ 26,534	$ 24,662	$ 23,360
Average Shares Outstanding:
Basic Shares, in Shares	13,391	13,281	13,242
Diluted Shares, in Shares	13,476	13,330	13,272
Per Common Share:
Basic Earnings, in USD Per Share	$ 1.98	$ 1.86	$ 1.76
Diluted Earnings, In USD Per Share	$ 1.97	$ 1.85	$ 1.76