Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Loans	$ 10,293,494	$ 9,430,761
Allowance for loan losses	(90,404)	(81,143)
Net loans	10,203,090	9,349,618
Loans held for sale	11,880	589
Investment securities:
Available for sale	6,295,687	6,806,949
Held to maturity (fair value of $1,097,988 and $691,379, respectively)	1,009,117	667,106
Trading securities	58,062	29,617
Other securities	66,853	65,198
Total investment securities	7,429,719	7,568,870
Federal funds sold and securities purchased under agreements to resell	244,891	173,627
Interest-bearing due from banks	453,189	522,877
Cash and due from banks	354,184	458,217
Premises and equipment, net	287,267	281,471
Accrued income	93,016	90,127
Goodwill	228,396	228,346
Other intangibles, net	37,419	46,782
Other assets	383,095	373,721
Total assets	19,726,146	19,094,245
Deposits:
Noninterest-bearing demand	6,008,326	6,306,895
Interest-bearing demand and savings	8,288,670	7,529,972
Time deposits under $250,000	658,541	771,973
Time deposits of $250,000 or more	422,712	483,912
Total deposits	15,378,249	15,092,752
Federal funds purchased and repurchase agreements	2,021,123	1,818,062
Short-term debt		5,009
Long-term debt	75,418	86,070
Accrued expenses and taxes	163,221	161,245
Other liabilities	63,507	37,413
Total liabilities	17,701,518	17,200,551
SHAREHOLDERS' EQUITY
Common stock, $1.00 par value; 80,000,000 shares authorized; 55,056,730 shares issued; and 49,546,069 and 49,396,366 shares outstanding, respectively	55,057	55,057
Capital surplus	1,028,869	1,019,889
Retained earnings	1,112,613	1,033,990
Accumulated other comprehensive income (loss), net	42,512	(3,718)
Treasury stock, 5,510,661 and 5,660,364 shares, at cost, respectively	(214,423)	(211,524)
Total shareholders' equity	2,024,628	1,893,694
Total liabilities and shareholders' equity	$ 19,726,146	$ 19,094,245