Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ 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	$ 266,111	$ 246,410	$ 788,968	$ 718,021
Interest and dividends on investment securities:
Taxable	12,546	24,435	42,789	48,633
Exempt from federal income tax	1,727	2,048	5,762	6,233
Dividends	599	549	1,690	1,450
Interest on temporary investments and interest bearing deposits	4,204	2,800	9,837	6,044
Total interest income	285,187	276,242	849,046	780,381
INTEREST EXPENSE
Interest on deposits	45,876	25,692	123,561	62,561
Interest on securities sold under agreement to repurchase and federal funds purchased	448	103	1,661	321
Interest on borrowings	4,238	3,439	12,484	10,278
Interest on junior subordinated debentures	5,652	5,640	17,520	15,972
Total interest expense	56,214	34,874	155,226	89,132
Net interest income	228,973	241,368	693,820	691,249
PROVISION FOR LOAN AND LEASE LOSSES	23,227	11,711	56,263	38,686
Net interest income after provision for loan and lease losses	205,746	229,657	637,557	652,563
NON-INTEREST INCOME
Residential mortgage banking revenue, net	47,000	31,484	67,760	103,085
(Loss) gain on sale of debt securities, net	0	0	(7,186)	14
Gain (loss) on equity securities, net	257	(462)	83,559	(1,894)
Gain on loan and lease sales, net	1,762	2,772	5,864	5,350
BOLI income	2,067	2,051	6,328	6,181
Total non-interest income	88,512	72,388	256,075	222,606
NON-INTEREST EXPENSE
Salaries and employee benefits	106,819	103,575	311,526	323,466
Occupancy and equipment, net	35,446	36,530	107,723	112,775
Communications	3,617	4,165	11,743	13,045
Marketing	3,804	3,969	10,842	8,857
Services	15,326	14,794	40,763	46,482
FDIC assessments	2,587	4,303	8,366	13,475
Loss (gain) on other real estate owned, net	1,188	(128)	3,815	(258)
Intangible amortization	1,405	1,541	4,214	4,624
Other expenses	13,398	10,543	36,605	38,511
Total non-interest expense	183,590	179,292	535,597	560,977
Income before provision for income taxes	110,668	122,753	358,035	314,192
Provision for income taxes	26,166	31,772	87,690	78,240
Net income	$ 84,502	$ 90,981	$ 270,345	$ 235,952
Earnings per common share:
Basic (in dollars per share)	$ 0.38	$ 0.41	$ 1.23	$ 1.07
Diluted (in dollars per share)	$ 0.38	$ 0.41	$ 1.23	$ 1.07
Weighted average number of common shares outstanding:
Basic (in shares)	220,285	220,224	220,379	220,292
Diluted (in shares)	220,583	220,620	220,642	220,751
Service charges on deposits
NON-INTEREST INCOME
Revenue from contract with customer	$ 16,627	$ 15,574	$ 47,858	$ 46,089
Brokerage revenue
NON-INTEREST INCOME
Revenue from contract with customer	4,060	3,947	11,850	12,302
Other income
NON-INTEREST INCOME
Revenue from contract with customer	$ 16,739	$ 17,022	$ 40,042	$ 51,479