CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Loans	$ 5,389,763	$ 4,960,343
Allowance for loan losses	(71,368)	(72,017)
Net loans	5,318,395	4,888,326
Loans held for sale	13,899	10,215
Investment Securities:
Available for sale	6,487,124	6,107,882
Held to maturity (market value of $113,221 and $102,287, respectively)	98,479	89,246
Trading	39,919	58,142
Federal Reserve Bank stock and other	25,526	22,212
Total investment securities	6,651,048	6,277,482
Federal funds sold and securities purchased under agreements to resell	41,172	66,078
Interest-bearing due from banks	174,012	1,164,007
Cash and due from banks	397,339	446,580
Bank premises and equipment, net	239,234	227,936
Accrued income	70,099	75,997
Goodwill	209,758	211,114
Other intangibles	72,351	84,331
Other assets	98,538	89,332
Total assets	13,285,845	13,541,398
Deposits:
Noninterest-bearing demand	4,415,669	3,941,372
Interest-bearing demand and savings	5,070,680	4,680,125
Time deposits under $100,000	562,357	615,475
Time deposits of $100,000 or more	564,074	932,939
Total deposits	10,612,780	10,169,911
Federal funds purchased and repurchase agreements	1,164,199	1,950,827
Short-term debt		12,000
Long-term debt	5,632	6,529
Accrued expenses and taxes	191,926	186,380
Other liabilities	17,133	24,619
Total liabilities	11,991,670	12,350,266
SHAREHOLDERS' EQUITY
Common stock, $1.00 par value; 80,000,000 shares authorized; 55,056,730 shares issued; and 40,596,751 and 40,426,342 shares outstanding, respectively	55,057	55,057
Capital surplus	730,274	723,299
Retained earnings	774,641	697,923
Accumulated other comprehensive income	101,413	81,099
Treasury stock, 14,459,979 and 14,630,388 shares, at cost, respectively	(367,210)	(366,246)
Total shareholders' equity	1,294,175	1,191,132
Total liabilities and shareholders' equity	$ 13,285,845	$ 13,541,398