Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income
Interest and fees on loans	$ 190,189	$ 167,831	$ 541,846	$ 482,330
Interest bearing deposits with banks	1,156	372	2,695	993
Federal funds sold and securities purchased under resale agreements	1	1	3	4
Investment securities	15,496	16,130	49,084	44,601
Trading account securities	18	19	43	83
Federal Home Loan Bank and Federal Reserve Bank stock	1,094	821	3,143	2,375
Brokerage customer receivables	195	205	630	591
Total interest income	208,149	185,379	597,444	530,977
Interest expense
Interest on deposits	15,621	12,436	41,996	36,246
Interest on Federal Home Loan Bank advances	2,577	2,458	8,447	6,426
Interest on other borrowings	1,137	1,045	3,281	2,620
Interest on subordinated notes	1,778	1,776	5,332	5,328
Interest on junior subordinated debentures	2,400	2,124	6,973	6,034
Total interest expense	23,513	19,839	66,029	56,654
Net interest income	184,636	165,540	531,415	474,323
Provision for credit losses	9,571	8,322	26,734	23,883
Net interest income after provision for credit losses	175,065	157,218	504,681	450,440
Non-interest income
Wealth management	19,334	18,243	56,506	54,819
Mortgage banking	34,712	27,887	93,254	91,694
Service charges on deposit accounts	8,024	7,403	23,156	20,174
Gains (losses) on investment securities, net	3,305	(98)	6,070	402
Fees from covered call options	3,633	2,810	9,994	11,735
Trading (losses) gains, net	(432)	(135)	(916)	(452)
Operating lease income, net	4,459	613	11,270	755
Other	13,569	8,230	40,821	27,380
Total non-interest income	86,604	64,953	240,155	206,507
Non-interest expense
Salaries and employee benefits	103,718	97,749	300,423	282,300
Equipment	9,449	8,456	27,523	24,090
Operating lease equipment depreciation	3,605	431	9,040	547
Occupancy, net	12,767	12,066	36,658	35,818
Data processing	7,432	8,127	21,089	19,656
Advertising and marketing	7,365	6,237	18,085	16,550
Professional fees	5,508	4,100	14,986	13,838
Amortization of other intangible assets	1,085	1,350	3,631	3,297
FDIC insurance	3,686	3,035	11,339	9,069
OREO expense, net	1,436	(367)	3,344	1,885
Other	20,564	18,790	55,196	54,539
Total non-interest expense	176,615	159,974	501,314	461,589
Income before taxes	85,054	62,197	243,522	195,358
Income tax expense	31,939	23,842	91,255	74,120
Net income	53,115	38,355	152,267	121,238
Preferred stock dividends and discount accretion	3,628	4,079	10,884	7,240
Net income applicable to common shares	$ 49,487	$ 34,276	$ 141,383	$ 113,998
Net income per common share-Basic (usd per share)	$ 0.96	$ 0.71	$ 2.84	$ 2.39
Net income per common share-Diluted (usd per share)	0.92	0.69	2.72	2.29
Cash dividends declared per common share (usd per share)	$ 0.12	$ 0.11	$ 0.36	$ 0.33
Weighted average common shares outstanding	51,679	48,158	49,763	47,658
Dilutive potential common shares	4,047	4,049	3,931	4,141
Average common shares and dilutive common shares	55,726	52,207	53,694	51,799