Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest and fees on loans and leases:
Taxable	$ 67,902	$ 71,822	$ 74,086
Exempt from federal income taxes	4,918	4,178	3,731
Total interest and fees on loans and leases	72,820	76,000	77,817
Interest and dividends on investment securities:
Taxable	8,063	10,377	14,014
Exempt from federal income taxes	4,469	4,554	4,512
Other interest income	116	72	16
Total interest income	85,468	91,003	96,359
Interest expense
Interest on demand deposits	939	1,302	1,981
Interest on savings deposits	1,468	2,555	2,955
Interest on time deposits	6,576	10,054	17,371
Interest on short-term borrowings	332	2,116	3,481
Interest on long-term borrowings	1,413	1,442	2,935
Total interest expense	10,728	17,469	28,723
Net interest income	74,740	73,534	67,636
Provision for loan and lease losses	17,479	21,565	20,886
Net interest income after provision for loan and lease losses	57,261	51,969	46,750
Noninterest income
Trust fee income	6,344	6,080	5,536
Service charges on deposit accounts	5,057	6,693	7,036
Investment advisory commission and fee income	5,373	4,626	3,427
Insurance commission and fee income	7,733	7,694	7,081
Other service fee income	5,240	5,046	3,410
Bank owned life insurance income	1,668	1,270	1,321
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 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)
Other	533	1,139	496
Total noninterest income	34,407	34,418	29,917
Noninterest expense
Salaries and benefits	38,230	38,034	37,422
Net occupancy	5,782	5,476	5,274
Equipment	4,002	3,811	3,438
Marketing and advertising	1,760	2,318	1,840
Deposit insurance premiums	2,039	2,670	3,185
Other	16,197	15,040	14,165
Total noninterest expense	68,010	67,349	65,324
Income before income taxes	23,658	19,038	11,343
Applicable income taxes	4,776	3,282	563
Net income	$ 18,882	$ 15,756	$ 10,780
Net income per share:
Basic	$ 1.13	$ 0.95	$ 0.75
Diluted	$ 1.13	$ 0.95	$ 0.75
Dividends declared	$ 0.80	$ 0.80	$ 0.80