CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest income:
Interest and fees on loans	$ 47,077	$ 49,471	$ 94,715	$ 91,768
Interest and dividends on taxable investments	17,450	14,640	31,725	26,869
Interest and dividends on nontaxable investments	6,018	5,739	11,616	11,500
Total interest income	70,545	69,850	138,056	130,137
Interest expense:
Interest on deposits	4,380	6,791	9,889	12,797
Interest on borrowings	7,713	7,389	15,113	14,680
Interest on subordinated debt held by unconsolidated subsidiary trusts	681	1,483	1,374	2,950
Total interest expense	12,774	15,663	26,376	30,427
Net interest income	57,771	54,187	111,680	99,710
Less: provision for loan losses	2,155	1,050	3,799	2,100
Net interest income after provision for loan losses	55,616	53,137	107,881	97,610
Noninterest income:
Deposit service fees	11,035	10,488	21,404	20,173
Mortgage and other banking services	896	1,627	1,890	2,421
Benefit trust administration, consulting and actuarial fees	8,664	7,854	17,637	16,037
Wealth management services	3,101	2,782	6,233	4,962
Gain on investment securities & debt extinguishments, net	0	14	0	14
Total noninterest income	23,696	22,765	47,164	43,607
Operating expenses:
Salaries and employee benefits	26,844	25,531	54,269	48,642
Occupancy and equipment	6,130	6,253	12,593	12,310
Data processing and communications	5,768	5,179	11,351	9,949
Amortization of intangible assets	1,045	1,189	2,131	2,090
Legal and professional fees	1,804	1,307	4,012	2,646
Office supplies and postage	1,382	1,377	2,850	2,573
Business development and marketing	1,876	2,183	3,048	3,438
FDIC insurance premiums	903	1,177	1,809	2,538
Acquisition expenses	164	3,617	424	4,308
Other	3,454	3,313	6,286	5,948
Total operating expenses	49,370	51,126	98,773	94,442
Income before income taxes	29,942	24,776	56,272	46,775
Income taxes	8,871	6,790	16,375	12,629
Net income	$ 21,071	$ 17,986	$ 39,897	$ 34,146
Basic earnings per share (in dollars per share)	$ 0.53	$ 0.49	$ 1.02	$ 0.97
Diluted earnings per share (in dollars per share)	$ 0.53	$ 0.49	$ 1.01	$ 0.96
Dividends declared per share (in dollars per share)	$ 0.26	$ 0.24	$ 0.52	$ 0.48