Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income
Interest and fees on loans	$ 173,127	$ 154,676
Interest bearing deposits with banks	746	316
Federal funds sold and securities purchased under resale agreements	1	2
Investment securities	17,190	14,400
Trading account securities	11	13
Federal Home Loan Bank and Federal Reserve Bank stock	937	769
Brokerage customer receivables	219	181
Total interest income	192,231	170,357
Interest expense
Interest on deposits	12,781	11,814
Interest on Federal Home Loan Bank advances	2,886	2,156
Interest on other borrowings	1,058	788
Interest on subordinated notes	1,777	1,775
Interest on junior subordinated debentures	2,220	1,933
Total interest expense	20,722	18,466
Net interest income	171,509	151,891
Provision for credit losses	8,034	6,079
Net interest income after provision for credit losses	163,475	145,812
Non-interest income
Wealth management	18,320	18,100
Mortgage banking	21,735	27,800
Service charges on deposit accounts	7,406	6,297
Gains on available-for-sale securities, net	1,325	524
Fees from covered call options	1,712	4,360
Trading losses, net	(168)	(477)
Operating lease income, net	2,806	65
Other	15,616	7,872
Total non-interest income	68,752	64,541
Non-interest expense
Salaries and employee benefits	95,811	90,130
Equipment	8,767	7,779
Operating lease equipment depreciation	2,050	57
Occupancy, net	11,948	12,351
Data processing	6,519	5,448
Advertising and marketing	3,779	3,907
Professional fees	4,059	4,664
Amortization of other intangible assets	1,298	1,013
FDIC insurance	3,613	2,987
OREO expense, net	560	1,411
Other	15,326	17,571
Total non-interest expense	153,730	147,318
Income before taxes	78,497	63,035
Income tax expense	29,386	23,983
Net income	49,111	39,052
Preferred stock dividends and discount accretion	3,628	1,581
Net income applicable to common shares	$ 45,483	$ 37,471
Net income per common share-Basic	$ 0.94	$ 0.79
Net income per common share-Diluted	0.90	0.76
Cash dividends declared per common share	$ 0.12	$ 0.11
Weighted average common shares outstanding	48,448	47,239
Dilutive potential common shares	3,820	4,233
Average common shares and dilutive common shares	52,268	51,472