Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Loans	$ 9,430,761	$ 7,465,794
Allowance for loan losses	(81,143)	(76,140)
Net loans	9,349,618	7,389,654
Loans held for sale	589	624
Securities:
Available for sale	6,806,949	6,911,936
Held to maturity (fair value of $691,379 and $304,112, respectively)	667,106	278,054
Trading securities	29,617	27,203
Other securities	65,198	68,474
Total investment securities	7,568,870	7,285,667
Federal funds sold and securities purchased under agreements to resell	173,627	118,105
Interest-bearing due from banks	522,877	1,539,386
Cash and due from banks	458,217	444,299
Premises and equipment, net	281,471	257,835
Accrued income	90,127	79,297
Goodwill	228,346	209,758
Other intangibles, net	46,782	43,991
Other assets	373,721	132,344
Total assets	19,094,245	17,500,960
Deposits:
Noninterest-bearing demand	6,306,895	5,643,989
Interest-bearing demand and savings	7,529,972	6,709,281
Time deposits under $250,000	771,973	636,507
Time deposits of $250,000 or more	483,912	627,082
Total deposits	15,092,752	13,616,859
Federal funds purchased and repurchase agreements	1,818,062	2,025,132
Short-term debt	5,009
Long-term debt	86,070	8,810
Accrued expenses and taxes	161,245	180,074
Other liabilities	37,413	26,327
Total liabilities	17,200,551	15,857,202
SHAREHOLDERS' EQUITY
Common stock, $1.00 par value; 80,000,000 shares authorized, 55,056,730 shares issued and 49,396,366 and 45,532,188 shares outstanding, respectively	55,057	55,057
Capital surplus	1,019,889	894,602
Retained earnings	1,033,990	963,911
Accumulated other comprehensive (loss) income, net	(3,718)	11,006
Treasury stock, 5,660,364 and 9,524,542 shares, at cost, respectively	(211,524)	(280,818)
Total shareholders' equity	1,893,694	1,643,758
Total liabilities and shareholders' equity	$ 19,094,245	$ 17,500,960