Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 46,529	$ 40,676	$ 35,184
Adjustments to Reconcile Net Income to Net Cash from Operating Activities:
Net Amortization on Securities	3,550	3,543	3,675
Depreciation and Amortization	6,184	4,687	4,315
Loans Originated for Sale	(131,916)	(122,518)	(138,192)
Proceeds from Sales of Loans Held-for-Sale	137,417	134,316	137,307
Provision for Loan Losses	2,070	1,750	1,200
Gain on Sale of Loans, net	(3,004)	(3,280)	(3,359)
Gain on Securities, net	(706)	(596)	(1,979)
Gain on Sales of Other Real Estate and Repossessed Assets	(41)	(17)	(55)
Loss (Gain) on Disposition and Donation of Premises and Equipment	(36)	870	5
Loss on Disposition of Land	44	0	0
Post Retirement Medical Benefit	(55)	(34)	7
Increase in Cash Surrender Value of Company Owned Life Insurance	(1,141)	(1,370)	(1,068)
Equity Based Compensation	1,355	1,246	1,407
Excess Tax Benefit from Restricted Share Grant	32	240	200
Change in Assets and Liabilities:
Interest Receivable and Other Assets	2,211	(4,528)	5,813
Interest Payable and Other Liabilities	(162)	(110)	(2,547)
Net Cash from Operating Activities	62,331	54,875	41,913
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of Other Short-term Investments	0	0	(1,000)
Proceeds from Maturity of Other Short-term Investments	0	0	1,992
Proceeds from Maturities of Securities Available-for-Sale	78,714	79,955	103,301
Proceeds from Sales of Securities Available-for-Sale	91,013	49,459	165,102
Purchase of Securities Available-for-Sale	(140,604)	(156,802)	(225,456)
Proceeds from Maturities of Securities Held-to-Maturity	0	0	95
Purchase of Federal Home Loan Bank Stock	0	0	(1,350)
Proceeds from Redemption of Federal Home Loan Bank Stock	2,607	0	0
Purchase of Loans	(1,209)	(5,547)	(5,383)
Proceeds from Sales of Loans	6,000	1,106	2,029
Loans Made to Customers, net of Payments Received	(87,127)	(149,336)	(106,198)
Proceeds from Sales of Other Real Estate	662	1,435	1,429
Property and Equipment Expenditures	(15,186)	(11,183)	(5,234)
Proceeds from Sales of Property and Equipment	40	6	0
Proceeds from Sale of Land	393	0	0
Proceeds from Life Insurance	765	1,627	0
Acquisition of River Valley Bancorp	0	0	(1,016)
Cash from Acquisition of Bank Branches	42,700	0	0
Acquisition of First Security, Inc.	(17,566)	0	0
Net Cash from Investing Activities	(38,798)	(189,280)	(71,689)
CASH FLOWS FROM FINANCING ACTIVITIES
Change in Deposits	(11,112)	134,737	118,231
Change in Short-term Borrowings	42,999	(4,054)	(40,163)
Advances in Long-term Debt	25,000	75,000	0
Repayments of Long-term Debt	(40,155)	(53,864)	(24,910)
Issuance (Retirement) of Common Stock		(29)	55
Dividends Paid	(14,074)	(11,842)	(10,630)
Net Cash from Financing Activities	2,658	139,948	42,583
Net Change in Cash and Cash Equivalents	26,191	5,543	12,807
Cash and Cash Equivalents at Beginning of Year	70,359	64,816	52,009
Cash and Cash Equivalents at End of Year	96,550	70,359	64,816
Cash Paid During the Year for
Interest	18,239	10,852	8,348
Income Taxes	5,920	12,462	9,254
Supplemental Non Cash Disclosures (See Note 18 for Business Combinations)
Loans Transferred to Other Real Estate	398	1,230	565
Reclassification of Land and Buildings to Other Assets	$ 850	$ 330	$ 664