Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest Income:
Interest and fees on loans and leases	$ 235,949	$ 207,820	$ 464,713	$ 401,040
Taxable interest and dividends on investments	50,634	47,427	102,510	94,715
Non-taxable interest on investment securities	5,529	5,096	10,931	10,367
Loans held for sale	145	148	293	290
Total interest income	292,257	260,491	578,447	506,412
Interest Expense:
Deposits	32,757	20,225	63,777	38,381
Securities sold under agreements to repurchase and other borrowings	3,904	3,998	6,656	7,638
Federal Home Loan Bank advances	7,772	8,471	15,557	15,752
Long-term debt	6,037	2,787	9,119	5,463
Total interest expense	50,470	35,481	95,109	67,234
Net interest income	241,787	225,010	483,338	439,178
Provision for loan and lease losses	11,900	10,500	20,500	21,500
Net interest income after provision for loan and lease losses	229,887	214,510	462,838	417,678
Non-interest Income:
Deposit service fees	43,118	40,859	86,142	81,310
Loan and lease related fees	6,558	6,333	14,377	13,329
Wealth and investment services	8,309	8,456	15,960	16,326
Mortgage banking activities	932	1,235	1,696	2,379
Increase in cash surrender value of life insurance policies	3,650	3,643	7,234	7,215
Other income			19,056	16,562
Noninterest Income, Other	13,286	7,848
Total non-interest income	75,853	68,374	144,465	137,121
Non-interest Expense:
Compensation and benefits	98,527	93,052	196,312	187,817
Occupancy	14,019	15,842	28,715	30,987
Technology and equipment	25,767	24,604	51,464	48,466
Intangible assets amortization	962	962	1,924	1,924
Marketing	4,243	4,889	7,571	8,441
Professional and outside services	5,634	4,381	11,682	9,169
Deposit insurance	4,453	13,687	8,883	20,404
Other expense	27,035	23,042	49,775	44,866
Total non-interest expense	180,640	180,459	356,326	352,074
Income (loss) before income tax expense	125,100	102,425	250,977	202,725
Income tax expense	26,451	20,743	52,592	40,818
Net income	98,649	81,682	198,385	161,907
Preferred stock dividends and other	(2,456)	(2,193)	(4,902)	(4,334)
Earnings applicable to common shareholders	$ 96,193	$ 79,489	$ 193,483	$ 157,573
Earnings per common share:
Basic (in dollars per share)	$ 1.05	$ 0.87	$ 2.11	$ 1.71
Diluted (in dollars per share)	$ 1.05	$ 0.86	$ 2.11	$ 1.71