Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
INTEREST INCOME
Loans	$ 93,949	$ 71,396	$ 184,493	$ 135,628
Securities:
Taxable interest	18,852	19,163	38,209	37,971
Tax-exempt interest	13,845	10,607	26,580	20,522
Total securities income	32,697	29,770	64,789	58,493
Federal funds and resell agreements	642	151	1,149	202
Interest-bearing due from banks	436	434	1,327	1,286
Trading securities	173	133	225	228
Total interest income	127,897	101,884	251,983	195,837
INTEREST EXPENSE
Deposits	4,136	3,522	8,191	6,570
Federal funds and repurchase agreements	1,626	470	2,856	962
Other	925	532	1,834	587
Total interest expense	6,687	4,524	12,881	8,119
Net interest income	121,210	97,360	239,102	187,718
Provision for loan losses	7,000	5,000	12,000	8,000
Net interest income after provision for loan losses	114,210	92,360	227,102	179,718
NONINTEREST INCOME
Trust and securities processing	59,745	67,381	119,230	134,680
Trading and investment banking	5,638	5,568	10,268	11,690
Service charges on deposit accounts	22,420	21,625	43,881	43,166
Insurance fees and commissions	1,160	586	2,657	1,156
Brokerage fees	4,262	2,936	8,447	5,790
Bankcard fees	17,534	18,035	35,550	34,218
Gain on sales of securities available for sale, net	2,598	967	5,531	8,303
Equity earnings (loss) on alternative investments	978	(1,125)	597	(1,967)
Other	7,112	3,577	11,636	7,721
Total noninterest income	121,447	119,550	237,797	244,757
NONINTEREST EXPENSE
Salaries and employee benefits	108,897	99,585	216,047	198,122
Occupancy, net	11,139	10,312	22,111	20,322
Equipment	17,032	15,410	33,314	29,582
Supplies and services	4,719	4,603	9,668	8,928
Marketing and business development	6,313	6,530	10,754	11,148
Processing fees	11,464	12,654	22,926	25,437
Legal and consulting	4,937	5,917	9,736	10,295
Bankcard	5,369	4,953	11,184	9,721
Amortization of other intangible assets	3,145	2,569	6,371	5,324
Regulatory fees	3,692	2,873	7,121	5,629
Other	8,536	6,558	16,755	11,869
Total noninterest expense	185,243	171,964	365,987	336,377
Income before income taxes	50,414	39,946	98,912	88,098
Income tax expense	13,117	9,732	25,370	24,119
NET INCOME	$ 37,297	$ 30,214	$ 73,542	$ 63,979
PER SHARE DATA
Net income - basic	$ 0.76	$ 0.65	$ 1.51	$ 1.40
Net income - diluted	0.76	0.65	1.50	1.39
Dividends	$ 0.245	$ 0.235	$ 0.490	$ 0.470
Weighted average shares outstanding - basic	48,770,948	46,240,869	48,763,690	45,624,276
Weighted average shares outstanding - diluted	49,165,686	46,611,096	49,126,207	46,029,978