Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
ASSETS
Cash and due from banks	$ 332,359	$ 348,440
Interest-bearing bank deposits	467,218	267,236
Federal funds sold	4,340	1,604
Securities available for sale, at fair value (amortized cost of $1,640,299 and $1,408,780)	1,662,410	1,421,772
Securities held to maturity (fair value of $2,253,219 and $2,576,584)	2,250,960	2,611,352
Loans held for sale	15,098	24,515
Loans	13,348,574	12,324,817
Less: allowance for loan losses	(125,572)	(133,626)
Loans, net	13,223,002	12,191,191
Property and equipment, net of accumulated depreciation of $187,692 and $172,798	407,987	432,346
Prepaid expenses	66,996	65,220
Other real estate, net	55,898	76,668
Accrued interest receivable	44,164	42,977
Goodwill	621,193	625,675
Other intangible assets, net	139,256	159,773
Life insurance contracts	422,562	381,437
FDIC loss share receivable	81,906	113,834
Deferred tax asset, net	60,323	89,708
Other assets	130,278	155,503
Total assets	19,985,950	19,009,251
Deposits:
Noninterest-bearing demand	5,866,255	5,530,253
Interest-bearing transaction, savings, money market and time	9,870,439	9,830,263
Total deposits	15,736,694	15,360,516
Short-term borrowings	1,171,809	657,960
Long-term debt	376,452	385,826
Accrued interest payable	5,663	4,353
Other liabilities	185,990	175,527
Total liabilities	17,476,608	16,584,182
Stockholders' equity
Common stock- $3.33 par value per share; 350,000,000 shares authorized, 81,566,640 and 82,237,162 shares outstanding	271,617	273,850
Capital surplus	1,560,912	1,558,432
Retained earnings	703,506	628,166
Accumulated other comprehensive (loss), net	(26,693)	(35,379)
Total stockholders' equity	2,509,342	2,425,069
Total liabilities and stockholders' equity	$ 19,985,950	$ 19,009,251