CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income:
Loans, including fees	$ 285,340	$ 249,348
Investment securities available for sale	23,928	19,834
Trading account assets	54	28
Mortgage loans held for sale	379	467
Federal Reserve Bank balances	1,750	1,211
Other earning assets	1,683	1,513
Total interest income	313,134	272,401
Interest expense:
Deposits	26,375	16,958
Federal funds purchased and securities sold under repurchase agreements	107	38
Long-term debt	12,368	15,478
Total interest expense	38,850	32,474
Net interest income	274,284	239,927
Provision for loan losses	12,776	8,674
Net interest income after provision for loan losses	261,508	231,253
Non-interest income:
Service charges on deposit accounts	19,940	20,118
Fiduciary and asset management fees	13,435	12,151
Card fees	10,199	9,844
Brokerage revenue	8,695	7,226
Mortgage banking income	5,047	5,766
Income from bank-owned life insurance	4,217	3,056
Investment securities gains, net	0	7,668
Decrease in fair value of private equity investments, net	(3,056)	(1,814)
Other fee income	4,618	4,868
Other non-interest income	3,951	2,956
Total non-interest income	67,046	71,839
Non-interest expense:
Salaries and other personnel expense	113,720	107,191
Net occupancy and equipment expense	31,480	29,331
Third-party processing expense	13,945	12,603
FDIC insurance and other regulatory fees	6,793	6,770
Professional fees	5,505	5,355
Advertising expense	5,092	5,912
Foreclosed real estate expense, net	856	2,134
Restructuring charges, net	(315)	6,511
Other operating expenses	18,103	21,581
Total non-interest expense	195,179	197,388
Income before income taxes	133,375	105,704
Income tax expense	30,209	33,847
Net income	103,166	71,857
Dividends on preferred stock	2,559	2,559
Net income available to common shareholders	$ 100,607	$ 69,298
Net income per common share, basic (in dollars per share)	$ 0.85	$ 0.57
Net income per common share, diluted (in dollars per share)	$ 0.84	$ 0.56
Weighted average common shares outstanding, basic (in shares)	118,666	122,300
Weighted average common shares outstanding, diluted (in shares)	119,321	123,059