Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 165,830	$ 136,690
Interest-bearing deposits with other banks	951,951	719,923
Federal funds sold	725	722
Total cash and cash equivalents	1,118,506	857,335
Securities available for sale at estimated fair value (amortized cost-$1,304,353 at September 30, 2016 and $1,072,340 at December 31, 2015)	1,311,220	1,066,334
Securities held to maturity (estimated fair value-$31,373 at September 30, 2016 and $36,319 at December 31, 2015)	33,971	39,099
Other investment securities	117,375	98,749
Loans held for sale	10,957	10,681
Loans	10,451,662	9,398,952
Less: Unearned income	(15,899)	(14,872)
Loans net of unearned income	10,435,763	9,384,080
Less: Allowance for loan losses	(72,657)	(75,726)
Net loans	10,363,106	9,308,354
Bank premises and equipment	76,619	73,089
Goodwill	867,311	710,252
Accrued interest receivable	38,743	35,801
Other assets	406,888	378,250
TOTAL ASSETS	14,344,696	12,577,944
Deposits:
Noninterest-bearing	3,250,455	2,699,958
Interest-bearing	7,327,877	6,641,569
Total deposits	10,578,332	9,341,527
Borrowings:
Federal funds purchased	32,200	22,230
Securities sold under agreements to repurchase	359,959	341,661
Federal Home Loan Bank borrowings	1,023,375	850,880
Other long-term borrowings	224,129	223,506
Reserve for lending-related commitments	1,122	936
Accrued expenses and other liabilities	96,900	84,569
TOTAL LIABILITIES	12,316,017	10,865,309
Shareholders' Equity
Preferred stock, $1.00 par value; Authorized-50,000,000 shares, none issued
Common stock, $2.50 par value; Authorized-100,000,000 shares; issued-76,467,447 and 69,626,932 at September 30, 2016 and December 31, 2015, respectively, including 28,274 and 23,835 shares in treasury at September 30, 2016 and December 31, 2015, respectively	191,169	174,067
Surplus	1,007,315	752,997
Retained earnings	859,199	824,603
Accumulated other comprehensive loss	(28,029)	(38,212)
Treasury stock, at cost	(975)	(820)
TOTAL SHAREHOLDERS' EQUITY	2,028,679	1,712,635
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 14,344,696	$ 12,577,944