CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022	Dec. 31, 2022
Cash flows from operating activities
Net income (loss)	$ 161,187		$ 863,317	$ (678,141)		$ 2,887,211
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Amortization of premiums and discounts of investments, net				105,438		19,404
Amortization of securitized debt premiums and discounts and deferred financing costs				6,435		(4,378)
Depreciation, amortization and other noncash expenses				12,032		11,145
Net (gains) losses on investments and derivatives				1,543,662		(1,944,200)
Business divestiture-related (gains) losses	0		23,955	0		24,309
Income (loss) from unconsolidated joint ventures				(289)		(10,378)
Loan loss provision (reversal)	0		(26,913)	(219)		(26,305)
Proceeds from sales and repayments of loans held for sale				747		1,619
Net receipts (payments) on derivatives				(332,685)		1,639,329
Net change in
Other assets				(12,979)		(42,741)
Interest receivable				(306,771)		(19,128)
Interest payable				(184,660)		435
Other liabilities				(34,903)		180,529
Net cash provided by (used in) operating activities				117,667		2,716,851
Cash flows from investing activities
Payments on purchases of securities				(18,067,651)		(14,422,639)
Proceeds from sales of securities				12,501,702		8,390,532
Principal payments on securities				3,012,034		5,737,737
Payments on purchases and origination of loans				(1,946,157)		(3,981,495)
Proceeds from sales of loans				0		1,832,930
Principal payments on loans				466,538		1,073,579
Payments on purchases of MSR				(213,346)		(683,972)
Proceeds from sales of MSR				0		9,065
Payments on purchases of interests in MSR				0		(4,913)
Proceeds from reverse repurchase agreements				32,900,024		7,750,024
Payments on reverse repurchase agreements				(32,900,024)		(7,750,024)
Net cash provided by (used in) investing activities				(4,246,880)		(2,049,176)
Cash flows from financing activities
Proceeds from repurchase agreements and other secured financing				2,519,472,348		1,849,361,390
Payments on repurchase agreements and other secured financing				(2,517,093,741)		(1,853,629,599)
Proceeds from issuances of securitized debt				2,355,559		3,946,614
Principal payments on securitized debt				(397,043)		(843,470)
Payments on purchases of securitized debt				(2,504)		(2,990)
Proceeds from participations issued				532,445		1,216,950
Payments on repurchases of participations issued				(825,613)		(1,468,384)
Principal payments on participations issued				(20,954)		(31,844)
Net contributions (distributions) from (to) noncontrolling interests				13,001		39,390
Net proceeds from stock offerings, direct purchases and dividend reinvestments				562,591		955,599
Settlement of stock-based awards in satisfaction of withholding tax requirements				(5,810)		(3,050)
Dividends paid				(800,908)		(696,439)
Net cash provided by (used in) financing activities				3,789,371		(1,155,833)
Net (decrease) increase in cash and cash equivalents				(339,842)		(488,158)
Cash and cash equivalents including cash pledged as collateral, beginning of period				1,576,714	[1],[2]	1,342,090	$ 1,342,090
Cash and cash equivalents including cash pledged as collateral, end of period	1,236,872	[2]	853,932	1,236,872	[2]	853,932	1,576,714	[1],[2]
Supplemental disclosure of cash flow information
Interest received				1,550,061		1,144,124
Interest paid (excluding interest paid on interest rate swaps)				1,780,252		170,594
Net interest received (paid) on interest rate swaps				618,036		(75,898)
Taxes received (paid)				(654)		(1,661)
Noncash investing and financing activities
Receivable for unsettled trades	787,442		434,227	787,442		434,227	575,091	[1]
Payable for unsettled trades	4,331,315		1,995,960	4,331,315		1,995,960	1,157,846	[1]
Net change in unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment				1,326,365		(5,269,336)
Dividends declared, not yet paid	$ 321,031		$ 354,027	$ 321,031		$ 354,027	$ 412,113	[1]

[1] (1)Derived from the audited consolidated financial statements at December 31, 2022.

[2] (2)Includes cash of consolidated Variable Interest Entities (“VIEs”) of $3.5 million and $2.2 million at June 30, 2023 and December 31, 2022, respectively.