Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 223,814	$ 195,681
Interest bearing deposits with other banks	979,800	303,663
Available-for-sale securities (amortized cost of $2,365,962 and $2,448,051, respectively)	2,434,032	2,513,518
Loans and leases	8,672,752	8,911,258
Less: Unearned income	35,763	40,947
Allowance for credit losses	164,466	195,118
Net loans and leases	8,472,523	8,675,193
Loans held for sale	129,138	83,458
Premises and equipment, net	319,456	323,383
Accrued interest receivable	44,356	51,266
Goodwill	275,173	271,297
Bank-owned life insurance	231,120	200,085
Other real estate owned	103,248	173,805
Other assets	184,538	204,502
Total Assets	13,397,198	12,995,851
Demand:
Noninterest bearing	2,545,169	2,269,799
Interest bearing	4,799,496	4,706,825
Savings	1,145,785	991,702
Other time	2,597,696	2,986,863
Total deposits	11,088,146	10,955,189
Federal funds purchased and securities sold under agreement to repurchase	414,611	373,933
Short-term Federal Home Loan Bank borrowings and other short-term borrowings	0	1,500
Accrued interest payable	6,140	8,644
Junior subordinated debt securities	160,312	160,312
Long-term Federal Home Loan Bank borrowings	33,500	33,500
Other liabilities	245,437	199,861
Total Liabilities	11,948,146	11,732,939
Shareholders' Equity
Common stock, $2.50 par value, Authorized - 500,000,000 shares; Issued - 94,549,867 and 83,483,796 shares, respectively	236,375	208,709
Capital surplus	311,909	227,567
Accumulated other comprehensive loss	(8,646)	(2,261)
Retained earnings	909,414	828,897
Total Shareholders' Equity	1,449,052	1,262,912
Commitments and contingencies
Total Liabilities and Shareholders' Equity	$ 13,397,198	$ 12,995,851