Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 425,693	$ 448,491
Interest-bearing bank deposits	446,617	1,498,985
Federal funds sold	15,696	1,203
Securities available for sale, at fair value (amortized cost of $1,435,823 and $1,986,882)	1,458,120	2,048,442
Securities held to maturity (fair value of $2,653,867 and $1,710,465)	2,666,082	1,668,018
Loans held for sale	18,444	50,605
Loans	11,751,958	11,595,512
Less: allowance for loan losses	(138,223)	(136,171)
unearned income	(17,486)	(17,710)
Loans, net	11,596,249	11,441,631
Property and equipment, net of accumulated depreciation of $169,178 and $160,592	450,233	477,864
Prepaid expenses	22,899	55,359
Other real estate, net	85,357	101,442
Accrued interest receivable	42,039	45,616
Goodwill	625,675	628,877
Other intangible assets, net	167,116	189,409
Life insurance contracts	376,908	367,317
FDIC loss share receivable	124,096	177,844
Deferred tax asset, net	153,893	128,385
Other assets	126,729	134,997
Total assets	18,801,846	19,464,485
Deposits:
Non-interest bearing demand	5,479,696	5,624,127
Interest-bearing savings, NOW, money market and time	9,575,175	10,120,061
Total deposits	15,054,871	15,744,188
Short-term borrowings	782,779	639,133
Long-term debt	376,664	396,589
Accrued interest payable	5,694	4,814
Other liabilities	225,396	226,483
Total liabilities	16,445,404	17,011,207
Stockholders' equity
Common stock-$3.33 par value per share; 350,000,000 shares authorized, 82,106,957 and 84,847,796 issued and outstanding, respectively	273,416	282,543
Capital surplus	1,554,135	1,647,638
Retained earnings	613,662	546,022
Accumulated other comprehensive loss, net	(84,771)	(22,925)
Total stockholders' equity	2,356,442	2,453,278
Total liabilities and stockholders' equity	$ 18,801,846	$ 19,464,485