Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net (loss) earnings	$ (1,354,404)	$ 350,755
Goodwill impairment	1,470,000	0
Depreciation and amortization	33,303	28,266
Amortization of net premiums on securities available-for-sale	9,994	11,078
Amortization of intangible assets	11,581	14,573
Amortization of operating lease ROU assets	22,080	22,028
Provision for credit losses	329,000	19,000
Gain on sale of foreclosed assets	(187)	(406)
Provision for losses on foreclosed assets	267	54
Gain on sale of loans and leases	(468)	(1,091)
Loss (gain) on sale of premises and equipment	309	(34)
Gain on sale of securities	(13,167)	(25,261)
Unrealized loss (gain) on derivatives and foreign currencies, net	494	(16)
Earned stock compensation	19,847	19,834
(Increase) decrease in other assets	(60,450)	50,345
Decrease in accrued interest payable and other liabilities	(125,262)	(41,530)
Net cash provided by operating activities	342,937	447,595
Cash flows from investing activities:
Net increase in loans and leases	(269,253)	(894,624)
Proceeds from sales of loans and leases	6,536	102,507
Proceeds from maturities and paydowns of securities available-for-sale	292,769	238,487
Proceeds from sales of securities available-for-sale	167,267	1,554,805
Purchases of securities available-for-sale	(1,085,749)	(1,444,720)
Net redemptions of Federal Home Loan Bank stock	23,674	5,238
Proceeds from sales of foreclosed assets	983	4,322
Purchases of premises and equipment, net	(11,013)	(10,990)
Proceeds from sales of premises and equipment	4	60
Proceeds from BOLI death benefit	761	555
Net decrease (increase) in equipment leased to others under operating leases	16,860	(19,981)
Net cash used in investing activities	(857,161)	(464,341)
Cash flows from financing activities:
Net increase (decrease) in noninterest-bearing deposits	2,105,033	(446,400)
Net increase in interest-bearing deposits	2,629,213	1,310,432
Net decrease in borrowings	(1,699,008)	(118,083)
Common stock repurchased and restricted stock surrendered	(75,132)	(161,928)
Cash dividends paid	(130,310)	(217,041)
Net cash provided by financing activities	2,829,796	366,980
Net increase in cash, cash equivalents, and restricted cash	2,315,572	350,234
Cash, cash equivalents, and restricted cash, beginning of period	637,624	385,767
Cash, cash equivalents, and restricted cash, end of period	2,953,196	736,001
Supplemental disclosures of cash flow information:
Cash paid for interest	86,060	154,212
Cash paid for income taxes	92,953	89,505
Loans transferred to foreclosed assets	14,370	37
Transfers from loans held for investment to loans held for sale	$ 0	$ 25,124