Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest Income
Interest and Fees on Loans and Leases	$ 64,668	$ 65,344	$ 193,269	$ 197,479
Income on Investment Securities
Available-for-Sale	15,922	23,097	50,623	84,256
Held-to-Maturity	23,232	20,344	74,699	48,530
Deposits	3	6	6	6
Funds Sold	105	160	353	708
Other	283	279	844	837
Total Interest Income	104,213	109,230	319,794	331,816
Interest Expense
Deposits	2,931	4,561	9,623	14,585
Securities Sold Under Agreements to Repurchase	7,185	7,400	21,739	21,779
Funds Purchased	7	4	17	15
Long-Term Debt	458	499	1,454	1,475
Total Interest Expense	10,581	12,464	32,833	37,854
Net Interest Income	93,632	96,766	286,961	293,962
Provision for Credit Losses		2,180	979	10,471
Net Interest Income After Provision for Credit Losses	93,632	94,586	285,982	283,491
Noninterest Income
Trust and Asset Management	11,050	10,788	33,163	34,021
Mortgage Banking	11,745	5,480	24,376	11,263
Service Charges on Deposit Accounts	9,346	9,820	28,162	29,127
Fees, Exchange, and Other Service Charges	11,907	16,219	36,632	47,826
Investment Securities Gains (Losses), Net	13		(77)	6,084
Insurance	2,326	2,664	7,003	8,645
Other	5,987	5,892	18,045	17,282
Total Noninterest Income	52,374	50,863	147,304	154,248
Noninterest Expense
Salaries and Benefits	47,231	44,307	138,292	137,889
Net Occupancy	10,524	11,113	31,098	31,916
Net Equipment	4,523	4,662	15,018	14,101
Professional Fees	2,494	2,245	7,012	6,697
FDIC Insurance	1,822	2,065	5,981	7,319
Other	18,284	19,563	53,431	65,889
Total Noninterest Expense	84,878	83,955	250,832	263,811
Income Before Provision for Income Taxes	61,128	61,494	182,454	173,928
Provision for Income Taxes	19,896	18,188	56,665	53,114
Net Income	$ 41,232	$ 43,306	$ 125,789	$ 120,814
Basic Earnings Per Share (in dollars per share)	$ 0.92	$ 0.93	$ 2.78	$ 2.55
Diluted Earnings Per Share (in dollars per share)	$ 0.92	$ 0.92	$ 2.77	$ 2.54
Dividends Declared Per Share (in dollars per share)	$ 0.45	$ 0.45	$ 1.35	$ 1.35
Basic Weighted Average Shares (in shares)	44,913,348	46,806,439	45,280,541	47,358,049
Diluted Weighted Average Shares (in shares)	45,050,638	46,934,140	45,421,624	47,531,066