Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 313,428	$ 303,874
Interest-bearing bank deposits	152,417	564,671
Federal funds sold	742	884
Securities available for sale, at fair value (amortized cost of $2,261,278 and $2,086,745)	2,308,812	2,093,404
Securities held to maturity (fair value of $2,569,084 and $2,375,851)	2,497,558	2,370,388
Loans held for sale	42,297	20,434
Loans	16,035,796	15,703,314
Less: allowance for loan losses	(226,086)	(181,179)
Loans, net	15,809,710	15,522,135
Property and equipment, net of accumulated depreciation of $223,046 and $209,763	366,402	377,015
Prepaid expenses	19,165	17,560
Other real estate, net	22,641	26,256
Accrued interest receivable	57,605	54,068
Goodwill	621,193	621,193
Other intangible assets, net	97,409	107,538
Life insurance contracts	477,051	434,550
FDIC loss share receivable	21,075	29,868
Deferred tax asset, net	68,107	75,830
Other assets	188,178	213,937
Total assets	23,063,790	22,833,605
Deposits:
Noninterest-bearing	7,151,416	7,276,127
Interest-bearing	11,665,453	11,072,785
Total deposits	18,816,869	18,348,912
Short-term borrowings	1,095,107	1,423,644
Long-term debt	468,028	490,145
Accrued interest payable	8,640	6,609
Other liabilities	211,781	151,152
Total liabilities	20,600,425	20,420,462
Stockholders' equity
Common Stock - $3.33 par value per share; 350,000,000 shares authorized, 77,538,260 and 77,496,429 outstanding	258,202	258,063
Capital surplus	1,693,667	1,684,101
Treasury shares at cost - 9,277,251 and 9,319,082 shares	(229,415)	(226,370)
Retained earnings	790,452	777,944
Accumulated other comprehensive loss, net	(49,541)	(80,595)
Total stockholders' equity	2,463,365	2,413,143
Total liabilities and stockholders' equity	$ 23,063,790	$ 22,833,605