Consolidated Statements of Income (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:
Loans, including fees	$ 99,811	$ 102,512	$ 198,299	$ 205,024
Securities:
Taxable	31,668	31,482	62,853	60,557
Tax-exempt	23,169	20,310	45,902	40,019
Interest-bearing deposits	1,472	989	2,643	1,844
Federal funds sold and resell agreements	13	21	29	31
Total interest income	156,133	155,314	309,726	307,475
Interest expense:
Deposits	5,946	7,377	11,897	15,938
Federal funds purchased and repurchase agreements	83	116	214	174
Junior subordinated deferrable interest debentures	1,691	1,783	3,363	3,556
Other long-term borrowings	4,080	4,142	8,160	8,327
Total interest expense	11,800	13,418	23,634	27,995
Net interest income	144,333	141,896	286,092	279,480
Provision for loan losses	8,985	8,650	18,435	22,221
Net interest income after provision for loan losses	135,348	133,246	267,657	257,259
Non-interest income:
Trust fees	18,976	17,037	37,196	34,000
Service charges on deposit accounts	23,619	24,925	46,987	49,734
Insurance commissions and fees	7,908	7,512	18,402	18,650
Other charges, commissions and fees	8,478	8,029	17,237	14,948
Net gain (loss) on securities transactions		1	5	6
Other	11,811	12,428	23,298	23,987
Total non-interest income	70,792	69,932	143,125	141,325
Non-interest expense:
Salaries and wages	61,775	58,827	124,205	119,102
Employee benefits	13,050	12,675	28,361	27,196
Net occupancy	11,823	11,637	23,475	22,772
Furniture and equipment	12,628	11,662	24,909	23,151
Deposit insurance	2,598	5,429	7,358	10,872
Intangible amortization	1,107	1,299	2,227	2,632
Other	33,816	33,125	66,323	63,523
Total non-interest expense	136,797	134,654	276,858	269,248
Income before income taxes	69,343	68,524	133,924	129,336
Income taxes	13,657	15,624	26,310	28,618
Net income	$ 55,686	$ 52,900	$ 107,614	$ 100,718
Earnings per common share:
Basic	$ 0.91	$ 0.87	$ 1.76	$ 1.67
Diluted	$ 0.91	$ 0.87	$ 1.75	$ 1.66