Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest income
Interest and fees on loans	$ 178,530	$ 159,823	$ 351,657	$ 314,499
Interest bearing deposits with banks	793	305	1,539	621
Federal funds sold and securities purchased under resale agreements	1	1	2	3
Investment securities	16,398	14,071	33,588	28,471
Trading account securities	14	51	25	64
Federal Home Loan Bank and Federal Reserve Bank stock	1,112	785	2,049	1,554
Brokerage customer receivables	216	205	435	386
Total interest income	197,064	175,241	389,295	345,598
Interest expense
Interest on deposits	13,594	11,996	26,375	23,810
Interest on Federal Home Loan Bank advances	2,984	1,812	5,870	3,968
Interest on other borrowings	1,086	787	2,144	1,575
Interest on subordinated notes	1,777	1,777	3,554	3,552
Interest on junior subordinated debentures	2,353	1,977	4,573	3,910
Total interest expense	21,794	18,349	42,516	36,815
Net interest income	175,270	156,892	346,779	308,783
Provision for credit losses	9,129	9,482	17,163	15,561
Net interest income after provision for credit losses	166,141	147,410	329,616	293,222
Non-interest income
Wealth management	18,852	18,476	37,172	36,576
Mortgage banking	36,807	36,007	58,542	63,807
Service charges on deposit accounts	7,726	6,474	15,132	12,771
Gains (losses) on available-for-sale securities, net	1,440	(24)	2,765	500
Fees from covered call options	4,649	4,565	6,361	8,925
Trading (losses) gains, net	(316)	160	(484)	(317)
Operating lease income, net	4,005	77	6,811	142
Other	11,636	11,278	27,252	19,150
Total non-interest income	84,799	77,013	153,551	141,554
Non-interest expense
Salaries and employee benefits	100,894	94,421	196,705	184,551
Equipment	9,307	7,855	18,074	15,634
Operating lease equipment depreciation	3,385	59	5,435	116
Occupancy, net	11,943	11,401	23,891	23,752
Data processing	7,138	6,081	13,657	11,529
Advertising and marketing	6,941	6,406	10,720	10,313
Professional fees	5,419	5,074	9,478	9,738
Amortization of other intangible assets	1,248	934	2,546	1,947
FDIC insurance	4,040	3,047	7,653	6,034
OREO expense, net	1,348	841	1,908	2,252
Other	19,306	18,178	34,632	35,749
Total non-interest expense	170,969	154,297	324,699	301,615
Income before taxes	79,971	70,126	158,468	133,161
Income tax expense	29,930	26,295	59,316	50,278
Net income	50,041	43,831	99,152	82,883
Preferred stock dividends and discount accretion	3,628	1,580	7,256	3,161
Net income applicable to common shares	$ 46,413	$ 42,251	$ 91,896	$ 79,722
Net income per common share-Basic (usd per share)	$ 0.94	$ 0.89	$ 1.88	$ 1.68
Net income per common share-Diluted (usd per share)	0.90	0.85	1.80	1.61
Cash dividends declared per common share (usd per share)	$ 0.12	$ 0.11	$ 0.24	$ 0.22
Weighted average common shares outstanding	49,140	47,567	48,794	47,404
Dilutive potential common shares	3,965	4,156	3,887	4,220
Average common shares and dilutive common shares	53,105	51,723	52,681	51,624