Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Net Income	$ 24,662	$ 23,360	$ 21,795
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Loan Losses	1,347	1,848	200
Depreciation and Amortization	6,293	7,042	8,870
Allocation of ESOP Stock	495	452	426
Gains on the Sale of Securities Available-for-Sale	(172)	(137)	(527)
Held-to-maturity Securities, Sold Security, Realized Gain (Loss)	0	0	(18)
Losses on the Sale of Securities Available-for-Sale	43	27	0
Held-to-Maturity Securities, Sold, Realized Loss	0	0	5
Loans Originated and Held-for-Sale	(20,731)	(23,156)	(46,101)
Proceeds from the Sale of Loans Held-for-Sale	21,524	23,606	50,298
Net Gains on the Sale of Loans	(692)	(784)	(1,460)
Net Loss (Gains) on the Sale of Premises and Equipment, Other Real Estate Owned and Repossessed Assets	297	77	120
Gain (Loss) on Disposition of Business	(204)	0	0
Contributions to Pension Plans	(3,858)	(921)	(473)
Deferred Income Tax Expense (Benefit) Expense	1,180	(299)	294
Stock-Based Compensation Expense	227	197	198
Stock-Based Compensation Expense	308	360	372
Net Decrease in Other Assets	(1,147)	(806)	1,888
Net Increase (Decrease) in Other Liabilities	(646)	(225)	786
Net Cash Provided By Operating Activities	28,926	30,641	36,673
Cash Flows from Investing Activities:
Proceeds from the Sale of Securities Available-for-Sale	66,551	49,928	16,295
Proceeds from the Maturities and Calls of Securities Available-for-Sale	93,817	153,127	132,228
Purchases of Securities Available-for-Sale	(201,820)	(113,953)	(136,416)
Proceeds from Sale and Maturity of Held-to-maturity Securities	0	0	1,181
Proceeds from the Maturities and Calls of Securities Held-to-Maturity	48,409	56,714	47,228
Purchases of Securities Held-to-Maturity	(68,210)	(60,906)	(109,620)
Net (Increase) Decrease in Loans	(164,710)	(148,482)	(98,903)
Proceeds from the Sales of Premises and Equipment, Other Real Estate Owned and Repossessed Assets	1,901	1,237	1,789
Purchases of Premises and Equipment	(1,621)	(1,468)	(2,233)
Cash Paid for Subsidiaries	0	(75)	(75)
Proceeds from Divestiture of Businesses	132	0	0
Net Decrease (Increase) in Other Investments	(3,988)	1,430	(489)
Purchase of Bank Owned Life Insurance	0	(5,245)	0
Net Cash Used In Investing Activities	(229,539)	(67,693)	(149,015)
Cash Flows from Financing Activities:
Net Increase in Deposits	127,475	60,618	111,175
Net (Decrease) Increase in Short-Term Borrowings	44,752	(4,356)	23,099
Proceeds from Federal Home Loan Bank Advances	55,000	0	0
Federal Home Loan Bank Repayments	(10,000)	(10,000)	(10,000)
Purchases of Treasury Stock	(1,498)	(2,455)	(1,709)
Stock Options Exercised	918	1,454	1,254
Shares Issued Under the Employee Stock Purchase Plan	494	488	477
Tax Benefit from Exercise of Stock Options	59	25	23
Shares Issued for Dividend Reinvestment Plans	886	0	1,280
Cash Dividends Paid	(12,700)	(12,407)	(12,109)
Net Cash Provided By Financing Activities	205,386	33,367	113,490
Net Increase (Decrease) in Cash and Cash Equivalents	4,773	(3,685)	1,148
Cash and Cash Equivalents at Beginning of Year	46,295	49,980	48,832
Cash and Cash Equivalents at End of Year	51,068	46,295	49,980
Supplemental Disclosures to Statements of Cash Flow Information:
Interest on Deposits and Borrowings	4,856	5,932	8,067
Income Taxes	9,357	10,060	8,336
Non-cash Investing and Financing Activities:
Transfer of Loans to Other Real Estate Owned and Repossessed Assets	3,046	1,308	971
Shares Issued for Acquisition of Subsidiary	$ 0	$ 91	$ 233