Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income
Interest and fees on loans	$ 234,994	$ 196,916
Mortgage loans held-for-sale	2,818	2,398
Interest bearing deposits with banks	2,796	1,623
Federal funds sold and securities purchased under resale agreements	0	1
Investment securities	19,128	13,573
Trading account securities	14	11
Federal Home Loan Bank and Federal Reserve Bank stock	1,298	1,070
Brokerage customer receivables	157	167
Total interest income	261,205	215,759
Interest expense
Interest on deposits	26,549	16,270
Interest on Federal Home Loan Bank advances	3,639	1,590
Interest on other borrowings	1,699	1,139
Interest on subordinated notes	1,773	1,772
Interest on junior subordinated debentures	2,463	2,408
Total interest expense	36,123	23,179
Net interest income	225,082	192,580
Provision for credit losses	8,346	5,209
Net interest income after provision for credit losses	216,736	187,371
Non-interest income
Wealth management	22,986	20,148
Mortgage banking	30,960	21,938
Service charges on deposit accounts	8,857	8,265
Losses on investment securities, net	(351)	(55)
Fees from covered call options	1,597	759
Trading gains (losses), net	103	(320)
Operating lease income, net	9,691	5,782
Other	11,836	12,248
Total non-interest income	85,679	68,765
Non-interest expense
Salaries and employee benefits	112,436	99,316
Equipment	10,072	9,002
Operating lease equipment depreciation	6,533	4,636
Occupancy, net	13,767	13,101
Data processing	8,493	7,925
Advertising and marketing	8,824	5,150
Professional fees	6,649	4,660
Amortization of other intangible assets	1,004	1,164
FDIC insurance	4,362	4,156
OREO expense, net	2,926	1,665
Other	19,283	17,343
Total non-interest expense	194,349	168,118
Income before taxes	108,066	88,018
Income tax expense	26,085	29,640
Net income	81,981	58,378
Preferred stock dividends	2,050	3,628
Net income applicable to common shares	$ 79,931	$ 54,750
Net income per common share-Basic (usd per share)	$ 1.42	$ 1.05
Net income per common share-Diluted (usd per share)	1.40	1.00
Cash dividends declared per common share (usd per share)	$ 0.19	$ 0.14
Weighted average common shares outstanding (in shares)	56,137	52,267
Dilutive potential common shares (in shares)	888	4,160
Average common shares and dilutive common shares (in shares)	57,025	56,427