Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net income	$ 17,262	$ 16,902
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	9,500	7,774
Depreciation, amortization and accretion, net	2,943	2,383
Deferred income tax benefit	(1,181)	(1,975)
Gain on sale of securities available for sale		(159)
Gain on sales of mortgage loans held for sale	(1,397)	(1,431)
Origination of mortgage loans held for sale	(76,270)	(109,844)
Proceeds from sale of mortgage loans held for sale	79,042	114,606
Bank owned life insurance income	(761)	(742)
Decrease (increase) in value of private investment fund	703	(347)
Loss on the disposal of equipment	382	2
Loss on the sale of other real estate	37	24
Stock compensation expense	869	704
Excess tax benefits from share-based compensation arrangements	(87)	(89)
Decrease (increase) in accrued interest receivable and other assets	3,337	(7,135)
Decrease in accrued interest payable and other liabilities	(8,666)	(1,609)
Net cash provided by operating activities	25,713	19,064
Investing activities:
Purchases of securities available for sale	(249,429)	(190,473)
Proceeds from sale of securities available for sale		27,064
Proceeds from maturities of securities available for sale	211,106	137,623
Proceeds from maturities of securities held to maturity	20	11
Net increase in loans	(46,435)	(61,750)
Purchases of premises and equipment	(6,280)	(4,640)
Proceeds from disposal of premises and equipment	7	3
Proceeds from sale of foreclosed assets	5,953	1,111
Net cash used in investing activities	(85,058)	(91,051)
Financing activities:
Net increase in deposits	83,092	44,595
Net (decrease) increase in securities sold under agreements to repurchase and federal funds purchased	(2,281)	13,343
Net decrease in other short-term borrowings	(733)	(577)
Proceeds from Federal Home Loan Bank advances		20,000
Repayments of Federal Home Loan Bank advances	(8)	(8)
Repayments of subordinated debentures		(30)
Issuance of common stock for options and dividend reinvestment plan	474	518
Excess tax benefits from share-based compensation arrangements	87	89
Common stock repurchases	(167)	(81)
Cash dividends paid	(7,441)	(6,964)
Net cash provided by financing activities	73,023	70,885
Net increase (decrease) in cash and cash equivalents	13,678	(1,102)
Cash and cash equivalents at beginning of period	41,655	32,424
Cash and cash equivalents at end of period	55,333	31,322
Supplemental cash flow information:
Income tax payments	2,599	6,355
Cash paid for interest	11,903	14,878
Supplemental non-cash activity:
Transfers from loans to other real estate owned	$ 9,828	$ 4,579