Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest Income:
Interest and fees on loans and leases	$ 174,456	$ 152,171	$ 342,264	$ 301,979
Taxable interest and dividends on securities	46,408	45,311	92,348	93,350
Non-taxable interest on securities	5,722	4,656	11,338	8,871
Loans held for sale	203	293	519	566
Total interest income	226,789	202,431	446,469	404,766
Interest Expense:
Deposits	14,679	12,374	28,114	24,673
Securities sold under agreements to repurchase and other borrowings	3,583	3,379	7,123	7,552
Federal Home Loan Bank advances	8,156	7,291	15,649	14,538
Long-term debt	2,584	2,482	5,132	4,946
Total interest expense	29,002	25,526	56,018	51,709
Net interest income	197,787	176,905	390,451	353,057
Provision for loan and lease losses	7,250	14,000	17,750	29,600
Net interest income after provision for loan and lease losses	190,537	162,905	372,701	323,457
Non-interest Income:
Deposit service fees	38,192	34,894	75,198	69,819
Loan and lease related fees	6,344	6,266	13,552	11,310
Wealth and investment services	7,877	7,204	15,150	14,399
Mortgage banking activities	3,351	3,753	5,617	7,013
Increase in cash surrender value of life insurance policies	3,648	3,664	7,223	7,317
Gain on sale of investment securities, net	0	94	0	414
Impairment loss on securities recognized in earnings	(126)	0	(126)	(149)
Other income	5,265	9,200	10,979	17,326
Total non-interest income	64,551	65,075	127,593	127,449
Non-interest Expense:
Compensation and benefits	87,354	80,231	175,630	160,941
Occupancy	16,034	14,842	32,213	29,911
Technology and equipment	22,458	19,376	44,066	39,314
Intangible assets amortization	1,028	1,523	2,083	3,077
Marketing	4,615	4,669	10,056	9,593
Professional and outside services	3,507	3,754	7,783	6,565
Deposit insurance	6,625	6,633	13,357	13,419
Other expense	22,798	21,750	43,015	42,403
Total non-interest expense	164,419	152,778	328,203	305,223
Income (loss) before income tax expense	90,669	75,202	172,091	145,683
Income tax expense	29,090	24,599	51,041	48,033
Net of tax	61,579	50,603	121,050	97,650
Preferred stock dividends and other	(2,094)	(2,205)	(4,224)	(4,368)
Earnings applicable to common shareholders	$ 59,485	$ 48,398	$ 116,826	$ 93,282
Earnings per common share:
Basic (in dollars per share)	$ 0.65	$ 0.53	$ 1.27	$ 1.02
Diluted (in dollars per share)	$ 0.64	$ 0.53	$ 1.26	$ 1.02