Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 18,882	$ 15,756	$ 10,780
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	17,479	21,565	20,886
Depreciation of premises and equipment	2,591	2,517	2,357
Other-than-temporary impairment on equity securities	16	62	1,708
Other-than-temporary impairment on other long-lived assets	0	0	500
Net gain on sales of investment securities	(1,417)	(432)	(1,150)
Net gain on mortgage banking activities	(1,868)	(2,960)	(2,378)
Net loss (gain) on interest rate swap	0	1,072	(641)
Net loss on dispositions of fixed assets	12	11	144
Net loss on sales and write-downs of other real estate owned	798	377	207
Bank owned life insurance income	(1,668)	(1,270)	(1,321)
Net amortization (accretion) on investment securities	641	(18)	97
Amortization, fair market value adjustments and capitalization of other intangibles	607	100	238
Premium accretion on deposits and FHLB borrowings	0	(190)	(447)
Deferred tax expense (benefit)	1,613	(2,247)	(4,480)
Other adjustments to reconcile net income to cash provided by operating activities	0	0	(115)
Originations of loans held for sale	(176,503)	(170,266)	(143,615)
Proceeds from the sale of loans held for sale	179,414	170,098	144,688
Decrease (increase) in accrued interest receivable and other assets	692	3,734	(10,168)
Increase (decrease) in accrued interest payable and other liabilities	1,409	(3,063)	2,939
Net cash provided by operating activities	42,698	34,846	20,229
Cash flows from investing activities:
Net cash paid due to acquisitions, net of cash acquired	(1,849)	(927)	(157)
Net capital expenditures	(2,301)	(2,932)	(3,289)
Proceeds from maturities and calls of securities held-to-maturity	32	72	336
Proceeds from maturities and calls of securities available-for-sale	212,964	287,035	208,612
Proceeds from sales of securities held-to-maturity	0	0	930
Proceeds from sales of securities available-for-sale	40,481	13,466	48,647
Purchases of investment securities held-to-maturity	(45,952)	0	0
Purchases of investment securities available-for-sale	(201,025)	(352,989)	(242,202)
Purchases of lease financings	0	(4,816)	(4,178)
Net (increase) decrease loans and leases	(1,153)	(55,800)	15,153
(Increase) decrease in interest-bearing deposits	(49,957)	30,499	(42,796)
Proceeds from sales of other real estate owned	2,681	1,843	304
Purchases of bank owned life insurance	(12,500)	0	0
Proceeds from bank owned life insurance	791	0	0
Net cash used in investing activities	(57,788)	(84,549)	(18,640)
Cash flows from financing activities:
Net increase in deposits	62,962	122,013	36,929
Net decrease in short-term borrowings	(5,131)	(68,508)	(97,162)
Repayment of subordinated debt	(1,500)	(1,500)	(1,875)
Issuance of common stock	0	0	55,597
Proceeds from exercise of stock options	0	0	47
Purchases of treasury stock	(1,928)	(153)	(370)
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,287	2,189	2,058
Cash dividends paid	(13,367)	(13,249)	(11,078)
Net cash provided by (used in) financing activities	43,323	40,792	(15,854)
Net increase (decrease) in cash and due from banks	28,233	(8,911)	(14,265)
Cash and due from banks at beginning of year	11,624	20,535	34,800
Cash and due from banks at end of year	39,857	11,624	20,535
Cash paid during the year for:
Interest	11,202	21,202	30,440
Income taxes, net of refunds received	4,626	2,730	5,080
Goodwill and other intangibles due to acquisitions	1,849	927	157
Noncash transfer of loans to other real estate owned	$ 7,426	$ 1,205	$ 3,289