Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012		Mar. 31, 2012
ASSETS
Cash and due from banks	$ 147,947	$ 223,814	[1]	$ 184,441
Interest bearing deposits with other banks	969,506	979,800	[1]	665,675
Available-for-sale securities, at fair value	2,607,176	2,434,032	[1]	2,573,535
Loans and leases	8,614,791	8,672,752	[1]	8,777,538
Less: Unearned income	33,253	35,763	[1]	39,615
Allowance for credit losses	162,601	164,466	[1]	181,777
Net loans	8,418,937	8,472,523	[1]	8,556,146
Loans held for sale	105,523	129,138	[1]	110,294
Premises and equipment, net	313,980	319,456	[1]	321,720
Accrued interest receivable	44,696	44,356	[1]	50,008
Goodwill	275,173	275,173	[1]	271,297
Bank-owned life insurance	233,007	231,120	[1]	202,698
Other real estate owned	96,314	103,248	[1]	167,808
Other assets	180,876	184,538	[1]	203,950
TOTAL ASSETS	13,393,135	13,397,198	[1]	13,307,572
Deposits:
Demand: Noninterest bearing	2,582,859	2,545,169	[1]	2,260,012
Interest bearing	4,840,330	4,799,496	[1]	4,897,585
Savings	1,212,736	1,145,785	[1]	1,067,256
Other time	2,529,001	2,597,696	[1]	2,857,469
Total deposits	11,164,926	11,088,146	[1]	11,082,322
Federal funds purchased and securities sold under agreement to repurchase	353,742	414,611	[1]	401,089
Short-term Federal Home Loan Bank and other short-term borrowings	0	0	[1]	1,500
Accrued interest payable	5,519	6,140	[1]	7,652
Junior subordinated debt securities	160,312	160,312	[1]	160,312
Long-term Federal Home Loan Bank borrowings	33,500	33,500	[1]	33,500
Other liabilities	209,956	245,437	[1]	228,998
TOTAL LIABILITIES	11,927,955	11,948,146	[1]	11,915,373
SHAREHOLDERS' EQUITY
Common stock, $2.50 par value per share Authorized - 500,000,000 shares; Issued - 95,174,441, 94,549,867 and 94,436,177 shares, respectively	237,936	236,375	[1]	236,090
Capital surplus	311,091	311,909	[1]	309,426
Accumulated other comprehensive loss	(13,120)	(8,646)	[1]	(4,136)
Retained earnings	929,273	909,414	[1]	850,819
TOTAL SHAREHOLDERS' EQUITY	1,465,180	1,449,052	[1]	1,392,199
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 13,393,135	$ 13,397,198	[1]	$ 13,307,572

[1] Derived from audited financial statements.