CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
INTEREST INCOME
Loans	$ 54,720	$ 54,055
Securities:
Taxable interest	18,465	20,129
Tax-exempt interest	9,760	9,375
Total securities income	28,225	29,504
Federal funds and resell agreements	24	16
Interest-bearing due from banks	669	835
Trading securities	264	323
Total interest income	83,902	84,733
INTEREST EXPENSE
Deposits	3,792	4,988
Federal funds purchased and repurchase agreements	567	439
Other	60	217
Total interest expense	4,419	5,644
Net interest income	79,483	79,089
Provision for loan losses	2,000	4,500
Net interest income after provision for loan losses	77,483	74,589
NONINTEREST INCOME
Trust and securities processing	62,312	54,710
Trading and investment banking	7,109	9,678
Service charges on deposit accounts	21,523	20,011
Insurance fees and commissions	961	1,009
Brokerage fees	2,946	2,514
Bankcard fees	16,439	14,735
Gain on sales of securities available for sale, net	5,893	16,541
Other	3,833	13,103
Total noninterest income	121,016	132,301
NONINTEREST EXPENSE
Salaries and employee benefits	83,702	79,914
Occupancy, net	9,887	9,278
Equipment	11,934	10,665
Supplies and services	4,487	5,043
Marketing and business development	4,272	4,260
Processing fees	14,090	12,816
Legal and consulting	3,600	3,515
Bankcard	4,547	4,242
Amortization of other intangible assets	3,456	3,852
Regulatory Fees	1,911	2,419
Other	8,492	5,900
Total noninterest expense	150,378	141,904
Income before income taxes	48,121	64,986
Income tax expense	13,180	18,619
NET INCOME	$ 34,941	$ 46,367
PER SHARE DATA
Net income - basic	$ 0.88	$ 1.16
Net income - diluted	$ 0.87	$ 1.15
Dividends	$ 0.215	$ 0.205
Weighted average shares outstanding	39,881,505	40,025,456