CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest and fees on loans
Taxable	$ 104,936	$ 104,205	$ 96,151
Tax exempt	471	86	148
Interest and dividends on securities
Taxable	13,575	16,406	17,562
Tax exempt	2,756	2,708	2,421
Interest on short-term investments	154	120	61
Total interest income	121,892	123,525	116,343
Interest on deposits	27,735	28,007	32,247
Interest on borrowings
Short-term	612	727	1,089
Long-term	1,465	2,138	2,726
Total interest expense	29,812	30,872	36,062
NET INTEREST INCOME	92,080	92,653	80,281
Provision for loan losses	13,800	23,947	21,202
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	78,280	68,706	59,079
NONINTEREST INCOME
Wealth advisory fees	3,462	3,247	2,980
Investment brokerage fees	2,560	2,266	1,676
Service charges on deposit accounts	7,950	8,436	8,245
Loan, insurance and service fees	4,849	4,300	3,540
Merchant card fee income	1,020	1,081	2,464
Other income	1,817	2,175	1,867
Mortgage banking income	1,000	1,587	1,695
Net securities gains (losses)	(167)	4	2
Other than temporary impairment on available-for-sale securities:
Total impairment losses recognized on securities	(286)	(1,716)	(309)
Loss recognized in other comprehensive income	0	129	84
Net impairment loss recognized in earnings	(286)	(1,587)	(225)
Total noninterest income	22,205	21,509	22,244
NONINTEREST EXPENSE
Salaries and employee benefits	32,807	30,375	27,765
Occupancy expense	3,106	2,899	3,206
Equipment costs	2,204	2,090	2,147
Data processing fees and supplies	3,655	3,931	3,944
Credit card interchange	2	158	1,448
Other expense	13,331	13,982	14,965
Total noninterest expense	55,105	53,435	53,475
INCOME BEFORE INCOME TAX EXPENSE	45,380	36,780	27,848
Income tax expense	14,718	12,237	8,869
NET INCOME	30,662	24,543	18,979
Dividends and accretion of discount on preferred stock	0	3,187	2,694
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 30,662	$ 21,356	$ 16,285
BASIC WEIGHTED AVERAGE COMMON SHARES	16,204,952	16,120,606	12,851,845
BASIC EARNINGS PER COMMON SHARE	$ 1.89	$ 1.32	$ 1.27
DILUTED WEIGHTED AVERAGE COMMON SHARES	16,324,644	16,213,747	12,952,444
DILUTED EARNINGS PER COMMON SHARE	$ 1.88	$ 1.32	$ 1.26