Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets:
Cash and due from banks	$ 448,491	$ 437,947
Interest-bearing bank deposits	1,498,985	1,184,222
Federal funds sold	1,203	197
Securities available for sale, at fair value (amortized cost of $1,986,882 and $4,401,345)	2,048,442	4,496,900
Securities held to maturity (fair value of $1,710,465)	1,668,018
Loans held for sale	50,605	72,378
Loans	11,595,512	11,191,901
Less: allowance for loan losses	(136,171)	(124,881)
unearned income	(17,710)	(14,875)
Loans, net	11,441,631	11,052,145
Property and equipment, net of accumulated depreciation of $160,592 and $148,780	477,864	505,387
Prepaid expense	55,359	69,064
Other real estate, net	101,442	144,367
Accrued interest receivable	45,616	53,973
Goodwill	628,877	651,162
Other intangible assets, net	189,409	211,075
Life insurance contracts	367,317	355,026
FDIC loss share receivable	177,844	231,085
Deferred tax asset, net	128,385	145,760
Other assets	134,997	163,408
Total assets	19,464,485	19,774,096
Deposits:
Non-interest bearing demand	5,624,127	5,516,336
Interest-bearing savings, NOW, money market and time	10,120,061	10,197,243
Total deposits	15,744,188	15,713,579
Short-term borrowings	639,133	1,044,454
Long-term debt	396,589	353,890
Accrued interest payable	4,814	8,284
Other liabilities	226,483	286,726
Total liabilities	17,011,207	17,406,933
Stockholders' equity:
Common stock-$3.33 par value per share; 350,000,000 shares authorized, 84,847,796 and 84,705,496 and outstanding, respectively	282,543	282,069
Capital surplus	1,647,638	1,634,634
Retained earnings	546,022	476,970
Accumulated other comprehensive income (loss), net	(22,925)	(26,510)
Total stockholders' equity	2,453,278	2,367,163
Total liabilities and stockholders' equity	$ 19,464,485	$ 19,774,096