Condensed Consolidated Statements of Cash Flows $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Cash flows from operating activities:
Goodwill impairment	$ 1,376,736	$ 0
Net (loss) earnings	(1,416,182)	374,104
Depreciation and amortization	40,295	40,181
Amortization of net premiums on investment securities	28,981	42,090
Amortization of intangible assets	7,189	10,947
Amortization of operating lease ROU assets	20,937	22,821
Provision for credit losses	5,000	14,500
Gain on sale of foreclosed assets	(793)	(3,353)
Provision for losses on foreclosed assets	701	0
Loss (gain) on sale of loans and leases	157,820	(130)
Gain on sale of premises and equipment	(647)	(3)
Loss on sale of securities	0	1,019
Gain on BOLI death benefit	(416)	0
Unrealized loss (gain) on derivatives, foreign currencies, and credit-linked notes, net	4,026	(1,961)
LOCOM HFS Adjustment	11,636	0
Earned stock compensation	14,174	26,906
Business Combination, Integration Related Costs	70	0
(Increase) decrease in other assets	(166,765)	1,445
Increase (decrease) in accrued interest payable and other liabilities	33,857	(29,471)
Net cash provided by operating activities	116,619	499,095
Cash flows from investing activities:
Net decrease (increase) in loans and leases	388,035	(4,800,187)
Proceeds from sales of loans and leases	5,946,033	60,782
Proceeds from maturities and paydowns of securities available-for-sale	203,958	569,409
Proceeds from sales of securities available-for-sale	0	1,038,946
Purchases of securities available-for-sale	(12,752)	(375,251)
Proceeds from maturities and paydowns of securities held-to-maturity	1,061	571
Net redemptions (purchases) of Federal Home Loan Bank stock	17,040	(19,740)
Proceeds from sales of foreclosed assets	14,235	16,500
Purchases of premises and equipment, net	(12,106)	(13,075)
Proceeds from sales of premises and equipment	9,018	9
Proceeds from BOLI death benefit	3,567	555
Net decrease (increase) in equipment leased to others under operating leases	25,151	(26,557)
Net cash provided by (used in) investing activities	6,583,240	(3,548,038)
Cash flows from financing activities:
Net decrease in noninterest-bearing deposits	(5,633,324)	(1,767,377)
Net (decrease) increase in interest-bearing deposits	(1,704,329)	965,492
Proceeds from (Repayments of) Debt	4,533,706	1,864,815
Net proceeds from preferred stock offering	0	498,516
Restricted stock surrendered	(5,266)	(9,430)
Preferred stock dividends paid	(29,841)	(9,392)
Common stock dividends paid	(31,360)	(90,207)
Net cash (used in) provided by financing activities	(2,870,414)	1,452,417
Net increase (decrease) in cash, cash equivalents, and restricted cash	3,829,445	(1,596,526)
Cash, cash equivalents, and restricted cash, beginning of period	2,240,222	4,057,234
Cash, cash equivalents, and restricted cash, end of period	6,069,667	2,460,708
Supplemental disclosures of cash flow information:
Cash paid for interest	715,421	101,613
Cash paid for income taxes	1,095	90,756
Loans transferred to foreclosed assets	15,950	3,271
Transfer of Portfolio Loans and Leases to Held-for-sale	3,076,427	15,534
Loan, Transfer from Held-for-Sale to Held-in-Portfolio	394,716	0
Liabilities	34,478,556
Transfer of securities available-for-sale to held-to-maturity	$ 0	$ 2,260,407