Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Activities
Net Income	$ 22,209	$ 21,118	$ 20,013
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Loan Losses	6,775	14,735	15,420
Depreciation and Amortization	1,801	1,867	1,894
Provision for Deferred Income Taxes	(1,260)	(1,877)	(7,412)
Net Amortization (Accretion) of Investment Security Premium & Discounts	1,230	289	(2,719)
Net Gain on Investment Securities	(95)	(2,895)	(3,524)
Net Gain on Sale of Property & Equipment	(5)	(19)	(11)
Net Change in Operating Assets & Liabilities:
Net Increase in Interest Receivable and Other Assets	(2,750)	(6,360)	(14,405)
Net Increase in Interest Payable and Other Liabilities	2,455	3,142	3,527
Net Cash Provided by Operating Activities	30,360	30,000	12,783
Investing Activities
Purchase of Investment Securities Available-for-Sale	(296,852)	(379,795)	(271,757)
Proceeds from Sold, Matured, or Called Securities Available-for-Sale	249,930	308,504	202,742
Purchase of Investment Securities Held-to-Maturity	(1,580)	(2,277)	(1,870)
Proceeds from Matured, or Called Securities Held-to-Maturity	3,402	6,984	4,129
Net Loans Paid, Originated or Acquired	6,778	24,193	(41,285)
Principal Collected on Loans Previously Charged Off	127	236	290
Additions to Premises and Equipment	(1,660)	(1,196)	(5,133)
Proceeds from Sale of Property & Equipment	20	21	16
Net Cash Used by Investing Activities	(39,835)	(43,330)	(112,868)
Financing Activities
Net Increase in Deposits	59,694	68,379	65,422
Net Change in Other Borrowings	(61)	(19,558)	19,446
Stock Repurchases	0	(608)	(2,329)
Cash Dividends	(9,158)	(8,855)	(8,596)
Net Cash Provided by Financing Activities	50,475	39,358	73,943
Increase (Decrease) in Cash and Cash Equivalents	41,000	26,028	(26,142)
Cash and Cash Equivalents at Beginning of Year	60,660	34,632	60,774
Cash and Cash Equivalents at End of Year	101,660	60,660	34,632
Supplementary Data
Loans Transferred to Foreclosed Assets (ORE)	1,092	3,407	5,571
Cash Payments Made for Income Taxes	12,070	16,025	15,950
Interest Paid	$ 8,474	$ 9,829	$ 17,843