Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks	$ 195,681	$ 99,916
Interest bearing deposits with other banks	303,663	172,170
Held-to-maturity securities (fair value of $- and $1,632,691, respectively)	0	1,613,019
Available-for-sale securities (amortized cost of $2,448,051 and $1,074,350, respectively)	2,513,518	1,096,062
Federal funds sold and securities purchased under agreement to resell	0	150,000
Loans and leases	8,911,258	9,376,351
Less: Unearned income	40,947	43,244
Allowance for credit losses	195,118	196,913
Net loans and leases	8,675,193	9,136,194
Loans held for sale	83,458	93,697
Premises and equipment, net	323,383	332,890
Accrued interest receivable	51,266	61,025
Goodwill	271,297	270,097
Bank-owned life insurance	200,085	194,064
Other real estate owned	173,805	133,412
Other assets	204,502	262,464
Total Assets	12,995,851	13,615,010
Demand:
Noninterest bearing	2,269,799	2,060,145
Interest bearing	4,706,825	4,931,518
Savings	991,702	863,034
Other time	2,986,863	3,635,324
Total deposits	10,955,189	11,490,021
Federal funds purchased and securities sold under agreement to repurchase	373,933	440,593
Short-term Federal Home Loan Bank borrowings and other short-term borrowings	1,500	2,727
Accrued interest payable	8,644	14,336
Junior subordinated debt securities	160,312	160,312
Long-term Federal Home Loan Bank borrowings	33,500	110,000
Other liabilities	199,861	174,777
Total Liabilities	11,732,939	12,392,766
Shareholders' Equity
Common stock, $2.50 par value Authorized - 500,000,000 shares; Issued - 83,483,796 and83,481,737 shares, respectively	208,709	208,704
Capital surplus	227,567	224,976
Accumulated other comprehensive loss	(2,261)	(14,453)
Retained earnings	828,897	803,017
Total Shareholders' Equity	1,262,912	1,222,244
Commitments and contingencies
Total Liabilities and Shareholders' Equity	$ 12,995,851	$ 13,615,010