Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net Income	$ 23,349	$ 22,209	$ 21,118
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Loan Losses	1,850	6,775	14,735
Depreciation and Amortization	1,704	1,801	1,867
Provision for Deferred Income Taxes	(2,548)	(1,260)	(1,877)
Net Amortization of Investment Security Premium & Discounts	3,944	1,230	289
Net Gain on Investment Securities	(158)	(95)	(2,895)
Net Gain on Sale of Property & Equipment	0	(5)	(19)
Net Change in Operating Assets & Liabilities:
Net Increase in Interest Receivable and Other Assets	(434)	(2,750)	(6,360)
Net Increase in Interest Payable and Other Liabilities	4,016	2,455	3,142
Net Cash Provided by Operating Activities	31,723	30,360	30,000
Investing Activities
Purchase of Investment Securities Available-for-Sale	(143,295)	(296,852)	(379,795)
Proceeds from Sold, Matured, or Called Securities Available-for-Sale	205,374	249,930	308,504
Purchase of Investment Securities Held-to-Maturity	(10,739)	(1,580)	(2,277)
Proceeds from Matured, or Called Securities Held-to-Maturity	5,419	3,402	6,984
Purchase of Life Insurance Contracts	(1,000)	0	0
Net Loans Paid, Originated or Acquired	(84,872)	6,778	24,193
Principal Collected on Loans Previously Charged Off	398	127	236
Additions to Premises and Equipment	(547)	(1,660)	(1,196)
Proceeds from Sale of Property & Equipment	0	20	21
Net Cash Used by Investing Activities	(29,262)	(39,835)	(43,330)
Financing Activities
Net Increase in Deposits	95,829	59,694	68,379
Net Change in Other Borrowings	(530)	(61)	(19,558)
Net Decrease in Securities Sold Under Agreement to Repurchase	(60,000)	0	0
Stock Repurchases	(576)	0	(608)
Cash Dividends	(9,418)	(9,158)	(8,855)
Net Cash Provided by Financing Activities	25,305	50,475	39,358
Increase in Cash and Cash Equivalents	27,766	41,000	26,028
Cash and Cash Equivalents at Beginning of Year	101,660	60,660	34,632
Cash and Cash Equivalents at End of Year	129,426	101,660	60,660
Supplementary Data
Loans Transferred to Foreclosed Assets (ORE)	58	1,092	3,407
Cash Payments Made for Income Taxes	17,472	12,070	16,025
Interest Paid	$ 5,553	$ 8,474	$ 9,829