Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
ASSETS
Cash and due from banks	$ 184,441	$ 195,681	$ 146,989
Interest bearing deposits with other banks	665,675	303,663	102,312
Held-to-maturity securities, at amortized cost	0	0	1,667,203
Available-for-sale securities, at fair value	2,573,535	2,513,518	1,145,463
Federal funds sold and securities purchased under agreement to resell	0	0	150,000
Loans and leases	8,777,538	8,911,258	9,255,609
Less: Unearned income	39,615	40,947	41,773
Allowance for credit losses	181,777	195,118	198,333
Net loans	8,556,146	8,675,193	9,015,503
Loans held for sale	110,294	83,458	56,876
Premises and equipment, net	321,720	323,383	329,862
Accrued interest receivable	50,008	51,266	61,105
Goodwill	271,297	271,297	271,297
Bank owned life insurance	202,698	200,085	194,988
Other real estate owned	167,808	173,805	136,412
Other assets	203,950	204,502	269,228
TOTAL ASSETS	13,307,572	12,995,851	13,547,238
Deposits:
Demand: Noninterest bearing	2,260,012	2,269,799	2,027,990
Interest bearing	4,897,585	4,706,825	5,023,073
Savings	1,067,256	991,702	932,574
Other time	2,857,469	2,986,863	3,480,477
Total deposits	11,082,322	10,955,189	11,464,114
Federal funds purchased and securities sold under agreement to repurchase	401,089	373,933	421,782
Short-term Federal Home Loan Bank and other short-term borrowings	1,500	1,500	2,715
Accrued interest payable	7,652	8,644	13,238
Junior subordinated debt securities	160,312	160,312	160,312
Long-term Federal Home Loan Bank borrowings	33,500	33,500	110,000
Other liabilities	228,998	199,861	164,016
TOTAL LIABILITIES	11,915,373	11,732,939	12,336,177
SHAREHOLDERS' EQUITY
Common stock, $2.50 par value per share Authorized - 500,000,000 shares; Issued - 94,436,177, 83,483,796 and 83,481,737 shares, respectively	236,090	208,709	208,704
Capital surplus	309,426	227,567	225,597
Accumulated other comprehensive loss	(4,136)	(2,261)	(16,579)
Retained earnings	850,819	828,897	793,339
TOTAL SHAREHOLDERS' EQUITY	1,392,199	1,262,912	1,211,061
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 13,307,572	$ 12,995,851	$ 13,547,238