Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 59,222	$ 46,529	$ 40,676
Adjustments to Reconcile Net Income to Net Cash from Operating Activities:
Net Amortization on Securities	3,862	3,550	3,543
Depreciation and Amortization	8,630	6,184	4,687
Loans Originated for Sale	(198,326)	(131,916)	(122,518)
Proceeds from Sales of Loans Held-for-Sale	189,875	137,417	134,316
Provision for Loan Losses	5,325	2,070	1,750
Gain on Sale of Loans, net	(4,633)	(3,004)	(3,280)
Gain on Securities, net	(1,248)	(706)	(596)
Gain on Sales of Other Real Estate and Repossessed Assets	200	(41)	(17)
Loss (Gain) on Disposition and Donation of Premises and Equipment	111	(36)	870
Loss (Gain) on Disposition of Land	(352)	44	0
Post Retirement Medical Benefit	(228)	(55)	(34)
Increase in Cash Surrender Value of Company Owned Life Insurance	(1,407)	(1,141)	(1,370)
Equity Based Compensation	1,287	1,355	1,246
Excess Tax Benefit from Restricted Share Grant	25	32	240
Change in Assets and Liabilities:
Interest Receivable and Other Assets	(1,602)	2,211	(4,528)
Interest Payable and Other Liabilities	4,488	(162)	(110)
Net Cash from Operating Activities	65,229	62,331	54,875
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from Maturity of Other Short-term Investments	496	0	0
Proceeds from Maturities of Securities Available-for-Sale	114,669	78,714	79,955
Proceeds from Sales of Securities Available-for-Sale	82,601	91,013	49,459
Purchase of Securities Available-for-Sale	(169,640)	(140,604)	(156,802)
Proceeds from Redemption of Federal Home Loan Bank Stock	1,145	2,607	0
Purchase of Loans	(2,051)	(1,209)	(5,547)
Proceeds from Sales of Loans	0	6,000	1,106
Loans Made to Customers, net of Payments Received	3,925	(87,127)	(149,336)
Proceeds from Sales of Other Real Estate	369	662	1,435
Property and Equipment Expenditures	(9,374)	(15,186)	(11,183)
Proceeds from Sales of Property and Equipment	0	40	6
Proceeds from Sale of Land	1,761	393	0
Proceeds from Life Insurance	1,216	765	1,627
Acquisition of First Security, Inc.	0	(17,566)	0
Cash from Acquisitions	0	42,700	0
Net Cash from Investing Activities	30,662	(38,798)	(189,280)
CASH FLOWS FROM FINANCING ACTIVITIES
Change in Deposits	(13,007)	(11,112)	134,737
Change in Short-term Borrowings	(82,037)	42,999	(4,054)
Advances in Long-term Debt	89,214	25,000	75,000
Repayments of Long-term Debt	(65,171)	(40,155)	(53,864)
Issuance (Retirement) of Common Stock			(29)
Dividends Paid	(17,556)	(14,074)	(11,842)
Net Cash from Financing Activities	(88,557)	2,658	139,948
Net Change in Cash and Cash Equivalents	7,334	26,191	5,543
Cash and Cash Equivalents at Beginning of Year	96,550	70,359	64,816
Cash and Cash Equivalents at End of Year	103,884	96,550	70,359
Cash Paid During the Year for
Interest	30,765	18,239	10,852
Income Taxes	7,977	5,920	12,462
Supplemental Non Cash Disclosures (See Note 18 for Business Combinations)
Loans Transferred to Other Real Estate	708	398	1,230
Reclassification of Land and Buildings to Other Assets	5,712	850	330
Right of Use Asset Obtained in Exchange for Lease Liabilities	9,034
Bank Acquisition
CASH FLOWS FROM INVESTING ACTIVITIES
Cash from Acquisitions	$ 5,545	$ 0	$ 0