Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Interest income:
Interest and fees on loans	$ 49,471	$ 44,851	$ 91,768	$ 89,524
Interest and dividends on taxable investments	14,640	12,168	26,869	23,101
Interest and dividends on nontaxable investments	5,739	5,604	11,500	11,050
Total interest income	69,850	62,623	130,137	123,675
Interest expense:
Interest on deposits	6,791	7,747	12,797	16,350
Interest on borrowings	7,389	7,446	14,680	15,149
Interest on subordinated debt held by unconsolidated subsidiary trusts	1,483	1,485	2,950	2,949
Total interest expense	15,663	16,678	30,427	34,448
Net interest income	54,187	45,945	99,710	89,227
Less: provision for loan losses	1,050	2,050	2,100	3,870
Net interest income after provision for loan losses	53,137	43,895	97,610	85,357
Noninterest income:
Deposit service fees	10,488	11,337	20,173	21,856
Mortgage banking and other services	1,627	1,115	2,421	2,038
Benefit plan administration, consulting and actuarial fees	7,854	7,260	16,037	15,159
Wealth management services	2,782	2,666	4,962	5,042
Gain on investment securities & debt extinguishments, net	14	0	14	0
Total noninterest income	22,765	22,378	43,607	44,095
Operating expenses:
Salaries and employee benefits	25,531	22,509	48,642	45,445
Occupancy and equipment	6,253	5,614	12,310	11,839
Data processing and communications	5,179	5,309	9,949	10,423
Amortization of intangible assets	1,189	1,849	2,090	3,708
Legal and professional fees	1,307	1,505	2,646	2,805
Office supplies and postage	1,377	1,311	2,573	2,560
Business development and marketing	2,183	1,731	3,438	2,745
FDIC insurance premiums	1,177	1,485	2,538	3,057
Acquisition expenses	3,617	199	4,308	199
Other	3,313	2,708	5,948	5,632
Total operating expenses	51,126	44,220	94,442	88,413
Income before income taxes	24,776	22,053	46,775	41,039
Income taxes	6,790	5,891	12,629	10,875
Net income	$ 17,986	$ 16,162	$ 34,146	$ 30,164
Basic earnings per share (in dollars per share)	$ 0.49	$ 0.49	$ 0.97	$ 0.91
Diluted earnings per share (in dollars per share)	$ 0.49	$ 0.48	$ 0.96	$ 0.90
Dividends declared per share (in dollars per share)	$ 0.24	$ 0.24	$ 0.48	$ 0.46