Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities:
Net income	$ 162,565,000	$ 171,903,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,832,000	1,616,000
Provision for credit losses	10,888,000	2,427,000
Gain on sale of loans	(52,883,000)	(82,755,000)
Proceeds from sales of loans	21,488,416,000	44,276,199,000
Loans and participations originated and purchased for sale	(20,209,971,000)	(44,463,275,000)
Purchases of low-income housing tax credits for sale	(22,122,000)
Proceeds from sale of low-income housing tax credits	8,556,000
Change in servicing rights for paydowns and fair value adjustments	(11,974,000)	526,000
Net change in:
Mortgage loans in process of securitization	431,791,000	(295,294,000)
Other assets and receivables	(20,958,000)	(1,209,000)
Other liabilities	50,630,000	3,007,000
Other	(2,854,000)	(980,000)
Net cash provided by operating activities	1,833,916,000	(387,835,000)
Investing activities:
Net change in securities purchased under agreements to resell	2,391,000	657,000
Purchases of available for sale securities	(50,274,000)	(195,206,000)
Purchases of held to maturity securities	(1,005,487,000)
Proceeds from the sale of available for sale securities	11,379,000	34,469,000
Proceeds from calls, maturities and paydowns of available for sale securities	12,755,000	128,502,000
Purchases of loans	(289,030,000)	(312,992,000)
Net change in loans receivable	(1,675,505,000)	(16,240,000)
Proceeds from sale of loans receivable		262,086,000
Purchase of FHLB stock	(10,326,000)	(111,000)
Proceeds from sale of FHLB stock	784,000
Proceeds from sale of servicing rights		438,000
Purchases of premises and equipment	(6,178,000)	(3,281,000)
Purchase of servicing rights	(2,057,000)
Purchase of limited partnership interests	(42,710,000)	(12,149,000)
Cash paid in deconsolidation of subsidiary		(464,000)
Other investing activities	4,314,000	404,000
Net cash used in investing activities	(3,049,944,000)	(113,887,000)
Financing activities:
Net change in deposits	1,336,866,000	1,537,148,000
Proceeds from borrowings	44,950,000,000	28,803,270,000
Repayment of borrowings	(45,890,075,000)	(29,342,391,000)
Proceeds from notes payable	3,400,000
Proceeds from issuance of preferred stock	137,371,000	191,084,000
Repurchase of preferred stock		(41,625,000)
Repurchase of common stock	(3,935,333)
Dividends	(26,252,000)	(22,916,000)
Net cash provided by (used in) financing activities	507,375,000	1,124,570,000
Net Change in Cash and Cash Equivalents	(708,653,000)	622,848,000
Cash and Cash Equivalents, Beginning of Period	1,032,614,000	179,728,000
Cash and Cash Equivalents, End of Period	323,961,000	802,576,000
Supplemental Cash Flows Information:
Interest paid	63,917,000	23,049,000
Income taxes paid, net of refunds	47,174,000	57,692,000
Transfer of loans from loans receivable to loans held for sale	788,849,000	131,563,000
Deconsolidation of debt fund entities