Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 329,872	$ 303,874
Interest-bearing bank deposits	128,028	564,671
Federal funds sold	892	884
Securities available for sale, at fair value (amortized cost of $2,370,621 and $2,086,745)	2,414,680	2,093,404
Securities held to maturity (fair value of $2,482,540 and $2,375,851)	2,428,432	2,370,388
Loans held for sale	42,545	20,434
Loans	16,070,821	15,703,314
Less: allowance for loan losses	(236,061)	(181,179)
Loans, net	15,834,760	15,522,135
Property and equipment, net of accumulated depreciation of $227,075 and $209,763	363,656	377,015
Prepaid expenses	18,842	17,560
Other real estate, net	19,097	26,256
Accrued interest receivable	59,000	54,068
Goodwill	621,193	621,193
Other intangible assets, net	92,523	107,538
Life insurance contracts	478,602	434,550
FDIC loss share receivable	18,030	29,868
Deferred tax asset, net	73,419	75,830
Other assets	185,159	213,937
Total assets	23,108,730	22,833,605
Deposits:
Noninterest-bearing	7,543,041	7,276,127
Interest-bearing	11,342,436	11,072,785
Total deposits	18,885,477	18,348,912
Short-term borrowings	1,075,956	1,423,644
Long-term debt	463,710	490,145
Accrued interest payable	9,919	6,609
Other liabilities	184,541	151,152
Total liabilities	20,619,603	20,420,462
Stockholders' equity
Common Stock - $3.33 par value per share; 350,000,000 shares authorized, 77,570,515 and 77,496,429 outstanding	258,310	258,063
Capital surplus	1,697,147	1,684,101
Treasury shares at cost - 9,246,656 and 9,319,082 shares	(228,701)	(226,370)
Retained earnings	818,060	777,944
Accumulated other comprehensive loss, net	(55,689)	(80,595)
Total stockholders' equity	2,489,127	2,413,143
Total liabilities and stockholders' equity	$ 23,108,730	$ 22,833,605