Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
INTEREST INCOME
Interest and fees on loans and leases	$ 229,457	$ 266,111	$ 710,624	$ 788,968
Interest and dividends on investment securities:
Taxable	10,168	12,546	35,788	42,789
Exempt from federal income tax	1,490	1,727	4,572	5,762
Dividends	710	599	1,956	1,690
Interest on temporary investments and interest bearing deposits	474	4,204	4,208	9,837
Total interest income	242,299	285,187	757,148	849,046
INTEREST EXPENSE
Interest on deposits	19,121	45,876	85,633	123,561
Interest on securities sold under agreement to repurchase and federal funds purchased	84	448	673	1,661
Interest on borrowings	3,271	4,238	11,156	12,484
Interest on junior subordinated debentures	3,249	5,652	12,074	17,520
Total interest expense	25,725	56,214	109,536	155,226
Net interest income	216,574	228,973	647,612	693,820
(RECAPTURE) PROVISION FOR CREDIT LOSSES	(338)	23,227	204,832	56,263
Net interest income after provision for credit losses	216,912	205,746	442,780	637,557
NON-INTEREST INCOME
Residential mortgage banking revenue, net	90,377	47,000	191,794	67,760
Gain (loss) on sale of debt securities, net	0	0	190	(7,186)
(Loss) gain on equity securities, net	(112)	257	942	83,559
Gain on loan and lease sales, net	1,092	1,762	3,333	5,864
BOLI income	2,087	2,067	6,332	6,328
Total non-interest income	131,924	88,512	288,049	256,075
NON-INTEREST EXPENSE
Salaries and employee benefits	120,337	106,819	346,787	311,526
Occupancy and equipment, net	36,720	35,446	109,892	107,723
Communications	2,943	3,617	9,010	11,743
Marketing	1,859	3,804	6,148	10,842
Services	13,193	15,326	34,319	40,763
FDIC assessments	2,989	2,587	9,502	8,366
Intangible amortization	1,247	1,405	3,740	4,214
Goodwill impairment	0	0	1,784,936	0
Other expenses	10,919	14,586	30,441	40,420
Total non-interest expense	190,207	183,590	2,334,775	535,597
Income (loss) before provision for income taxes	158,629	110,668	(1,603,946)	358,035
Provision for income taxes	33,758	26,166	70,204	87,690
Net income (loss)	$ 124,871	$ 84,502	$ (1,674,150)	$ 270,345
Earnings (loss) per common share:
Basic (in dollars per share)	$ 0.57	$ 0.38	$ (7.60)	$ 1.23
Diluted (in dollars per share)	$ 0.57	$ 0.38	$ (7.60)	$ 1.23
Weighted average number of common shares outstanding:
Basic (in shares)	220,221	220,285	220,216	220,379
Diluted (in shares)	220,418	220,583	220,216	220,642
Service charges on deposits
NON-INTEREST INCOME
Revenue from contract with customer	$ 14,438	$ 16,627	$ 41,907	$ 47,858
Brokerage revenue
NON-INTEREST INCOME
Revenue from contract with customer	3,686	4,060	11,506	11,850
Other income
NON-INTEREST INCOME
Revenue from contract with customer	$ 20,356	$ 16,739	$ 32,045	$ 40,042