Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest Income
Interest and fees on loans	$ 72,859	$ 78,174	$ 81,935
Interest on U.S. government and sponsored enterprise obligations	16,452	18,342	20,335
Interest on state and political subdivision obligations	1,385	1,662	2,111
Interest on federal funds sold and other investments	251	194	126
Total interest income	90,947	98,372	104,507
Interest Expense
Interest on deposits	9,293	11,591	15,143
Interest on borrowings	5,363	8,948	12,257
Interest on junior subordinated debentures	2,546	2,614	2,817
Total interest expense	17,202	23,153	30,217
Net interest income	73,745	75,219	74,290
Provision for credit losses	3,816	4,735	6,299
Net interest income after provision for credit losses	69,929	70,484	67,991
Non-Interest Income
Service charges on deposit accounts	5,557	5,134	4,911
Income from fiduciary services	5,038	6,027	6,236
Other service charges and fees	4,061	3,577	3,345
Net gains (losses) on sale of securities and other-than-temporary impairment of securities	2,498	2,076	(409)
Brokerage and insurance commissions	1,491	1,363	1,449
Bank-owned life insurance	1,382	2,173	1,478
Mortgage banking income, net	588	729	761
Proceeds from legal settlement			2,000
Other income	2,797	1,974	1,054
Total non-interest income	23,412	23,053	20,825
Non-Interest Expenses
Salaries and employee benefits	29,689	28,627	26,337
Furniture, equipment and data processing	5,079	4,773	4,647
Net occupancy	4,365	3,949	3,833
Acquisition costs	2,324
Other real estate owned and collection costs	2,284	2,104	3,459
Prepayment fees on borrowings	2,030	2,318
Consulting and professional fees	1,818	2,629	2,596
Regulatory assessments	1,793	1,955	2,868
Amortization of identifiable intangible assets	657	577	577
Other expenses	8,992	8,647	8,620
Total non-interest expenses	59,031	55,579	52,937
Income before income taxes	34,310	37,958	35,879
Income Taxes	10,882	11,781	11,113
Net Income	$ 23,428	$ 26,177	$ 24,766
Per Share Data
Basic earnings per share	$ 3.06	$ 3.41	$ 3.23
Diluted earnings per share	$ 3.05	$ 3.4	$ 3.23
Weighted average number of common shares outstanding	7,646,861	7,672,126	7,655,668
Diluted weighted average number of common shares outstanding	7,661,273	7,679,895	7,663,498