Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest Income
Interest and fees on loans	$ 220,034	$ 173,649
Interest and dividends on investment securities:
Taxable	30,104	23,475
Tax-exempt	9,217	8,129
Other interest	2,177	1,536
Total interest income	261,532	206,789
Interest Expense
Interest on deposits	33,412	16,924
Interest on Federal funds purchased and securities sold under agreements to repurchase	522	515
Interest on other short-term funding	3,005	1,080
Interest on long-term funding	14,722	7,996
Total interest expense	51,661	26,515
Net Interest Income	209,871	180,274
Provision for credit losses	0	9,000
Net interest income after provision for credit losses	209,871	171,274
Noninterest Income
Insurance commissions and fees	22,648	21,620
Service charges on deposit account fees	16,420	16,356
Card-based and loan fees	13,422	12,465
Trust and asset management fees	13,369	11,935
Brokerage commission and fees	7,273	4,333
Mortgage banking, net	6,370	4,579
Capital markets, net	5,306	3,883
Bank and corporate owned life insurance	3,187	2,615
Asset gains (losses), net	(107)	(234)
Other	2,492	2,279
Total noninterest income	90,380	79,831
Noninterest Expense
Personnel (1)	117,685	106,782
Occupancy	15,357	15,219
Technology	17,715	14,420
Equipment	5,556	5,485
Business development and advertising	6,693	5,835
Legal and professional	5,413	4,166
Card issuance and loan costs	3,304	2,620
Foreclosure / OREO expense, net	723	1,505
FDIC assessment	8,250	8,000
Other intangible amortization	1,525	513
Acquisition related costs(2)	20,605	0
Other(1)	10,140	9,146
Total noninterest expense	212,965	173,691
Income before income taxes	87,285	77,414
Income tax expense	17,829	21,144
Net income	69,456	56,270
Preferred stock dividends	2,339	2,330
Net income available to common equity	$ 67,117	$ 53,940
Earnings per common share:
Basic	$ 0.41	$ 0.36
Diluted	$ 0.40	$ 0.35
Average common shares outstanding:
Basic	163,520	150,815
Diluted	166,432	153,869