Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash Flows From Operating Activities
Net income (loss)	$ 146,600	$ (27,586)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation	9,121	7,790
Amortization of other intangible assets	6,186	4,811
Amortization of tax credit investments	2,761	1,516
Net premium amortization on investment securities	3,603	4,462
Accretion income related to acquired loans	(6,410)	(14,241)
Share-based compensation expense	12,742	6,284
Provision for credit losses	13,437	108,736
Debt securities (gains) losses, net	5,216	(342)
Net (gains) losses on sales of loans and other assets	829	(2,381)
Increase in cash surrender value of company-owned life insurance	(3,186)	(3,524)
Residential real estate loans originated for sale	(65,148)	(205,945)
Proceeds from sales of residential real estate loans	67,468	220,534
(Increase) decrease in interest receivable	1,533	635
(Increase) decrease in other assets	(3,833)	98,413
Increase (decrease) in accrued expenses and other liabilities	(137,230)	(38,102)
Net cash flows provided by (used in) operating activities	53,689	161,060
Cash Flows From Investing Activities
Cash received from merger, net	0	1,912,629
Purchases of investment securities available-for-sale	(44,413)	(814,796)
Purchases of investment securities held-to-maturity	(1,941)	(30,418)
Purchases of Federal Home Loan Bank/Federal Reserve Bank stock	(99,158)	(69,818)
Purchases of equity securities	(20,807)	(904)
Proceeds from maturities, prepayments, and calls of investment securities available-for-sale	164,893	342,435
Proceeds from sales of investment securities available-for-sale	51,522	10,839
Proceeds from maturities, prepayments, and calls of investment securities held-to-maturity	24,744	2,752
Proceeds from sales of Federal Home Loan Bank/Federal Reserve Bank stock	0	54,897
Proceeds from sales of equity securities	615	41,313
Loan originations and payments, net	(708,752)	(336,091)
Proceeds from company-owned life insurance death benefits	2,257	1,582
Proceeds from sales of premises and equipment and other assets	1,410	2,751
Purchases of premises and equipment and other assets	(10,456)	(9,588)
Net cash flows provided by (used in) investing activities	(640,086)	1,107,583
Net increase (decrease) in:
Deposits	(83,038)	(211,209)
Federal funds purchased and interbank borrowings	37,466	1,445
Securities sold under agreements to repurchase	(39,786)	(18,194)
Other borrowings	(4,002)	26,566
Payments for maturities of Federal Home Loan Bank advances	(750,150)	(6)
Proceeds from Federal Home Loan Bank advances	1,900,000	200,000
Cash dividends paid	(45,122)	(42,799)
Common stock repurchased	(43,710)	(70,078)
Common stock issued	262	165
Net cash flows provided by (used in) financing activities	971,920	(114,110)
Net increase (decrease) in cash and cash equivalents	385,523	1,154,533
Cash and cash equivalents at beginning of period	728,412	822,019
Cash and cash equivalents at end of period	1,113,935	1,976,552
Supplemental cash flow information:
Total interest paid	104,917	17,854
Total income taxes paid (net of refunds)	1,182	1,471
Issuance of common stock	0	2,446,312
Investment securities purchased but not settled	0	22,183
Securities transferred from available-for-sale to held-to-maturity	0	2,038,900
Operating lease right-of-use assets obtained in exchange for lease obligations	222	2,249
Finance lease right-of-use assets obtained in exchange for lease obligations	9,141	0
Preferred Stock
Supplemental cash flow information:
Issuance of common stock	$ 0	$ 243,870