Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest Income:
Interest and fees on loans and leases	$ 236,453	$ 215,448	$ 701,166	$ 616,488
Taxable interest and dividends on investments	52,046	47,646	154,556	142,361
Non-taxable interest on investment securities	5,471	5,061	16,402	15,428
Loans held for sale	166	208	459	498
Total interest income	294,136	268,363	872,583	774,775
Interest Expense:
Deposits	34,214	24,397	97,991	62,778
Securities sold under agreements to repurchase and other borrowings	6,571	3,084	13,227	10,722
Federal Home Loan Bank advances	6,910	7,685	22,467	23,437
Long-term debt	5,902	2,825	15,021	8,288
Total interest expense	53,597	37,991	148,706	105,225
Net interest income	240,539	230,372	723,877	669,550
Provision for loan and lease losses	11,300	10,500	31,800	32,000
Net interest income after provision for loan and lease losses	229,239	219,872	692,077	637,550
Non-interest Income:
Deposit service fees	41,410	40,601	127,552	121,911
Loan and lease related fees	8,246	10,782	22,623	24,111
Wealth and investment services	8,496	8,412	24,456	24,738
Mortgage banking activities	2,133	1,305	3,829	3,684
Increase in cash surrender value of life insurance policies	3,708	3,706	10,942	10,921
Other income			24,994	24,040
Noninterest Income, Other	5,938	7,478
Total non-interest income	69,931	72,284	214,396	209,405
Non-interest Expense:
Compensation and benefits	98,623	96,640	294,935	284,457
Occupancy	14,087	14,502	42,802	45,489
Technology and equipment	26,180	24,553	77,644	73,019
Intangible assets amortization	961	961	2,885	2,885
Marketing	4,758	4,052	12,329	12,493
Professional and outside services	5,024	4,930	16,706	14,099
Deposit insurance	4,409	9,694	13,292	30,098
Other expense	25,852	23,451	75,627	68,317
Total non-interest expense	179,894	178,783	536,220	530,857
Income (loss) before income tax expense	119,276	113,373	370,253	316,098
Income tax expense	25,411	13,700	78,003	54,518
Net income	93,865	99,673	292,250	261,580
Preferred stock dividends and other	(2,423)	(2,213)	(7,331)	(6,540)
Earnings applicable to common shareholders	$ 91,442	$ 97,460	$ 284,919	$ 255,040
Earnings per common share:
Basic (in dollars per share)	$ 1.00	$ 1.06	$ 3.11	$ 2.77
Diluted (in dollars per share)	$ 1.00	$ 1.06	$ 3.10	$ 2.77