Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows from Operating Activities:
Net income	$ 889,857	$ 389,397
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred financing costs, premiums and discounts on secured borrowings	34,705	32,141
Amortization of discounts and deferred financing costs on unsecured senior notes	6,560	5,387
Accretion of net discount on investment securities	(9,725)	(10,090)
Accretion of net deferred loan fees and discounts	(47,468)	(44,523)
Share-based compensation	29,703	29,359
Manager fees paid in stock	42,695	16,554
Change in fair value of investment securities	1,683	(903)
Change in fair value of consolidated VIEs	39,138	26,990
Change in fair value of servicing rights	(1,234)	(2,740)
Change in fair value of loans	326,737	(68,116)
Change in fair value of affordable housing fund investments	(628,956)	0
Change in fair value of derivatives	(465,986)	(70,661)
Foreign currency loss, net	213,201	36,057
Gain on sale of investments and other assets	(112,059)	(26,377)
Impairment charges on properties and related intangibles	55	0
Credit loss provision (reversal), net	20,123	(12,363)
Depreciation and amortization	39,911	67,653
Earnings from unconsolidated entities	(911)	(6,002)
Distributions of earnings from unconsolidated entities	4,935	1,623
Loss on extinguishment of debt	837	2,197
Origination and purchase of loans held-for-sale, net of principal collections	(3,641,067)	(3,027,235)
Proceeds from sale of loans held-for-sale	3,992,896	2,333,767
Changes in operating assets and liabilities:
Related-party payable	(50,225)	(15,792)
Accrued and capitalized interest receivable, less purchased interest	(131,678)	(105,039)
Other assets	(200,496)	(27,236)
Accounts payable, accrued expenses and other liabilities	491,503	14,199
Net cash provided by (used in) operating activities	844,734	(461,753)
Cash Flows from Investing Activities:
Origination, purchase and funding of loans held-for-investment	(5,007,398)	(5,635,707)
Proceeds from principal collections on loans	1,840,317	3,173,764
Proceeds from loans sold	71,008	267,349
Purchase and funding of investment securities	(86,058)	0
Proceeds from principal collections on investment securities	19,431	77,855
Proceeds from sales of real estate	166,424	60,969
Purchases and additions to properties and other assets	(17,295)	(17,259)
Investments in unconsolidated entities	(461)	0
Distribution of capital from unconsolidated entities	3,375	25,555
Cash resulting from initial consolidation of entities	617	0
Payments for purchase or termination of derivatives	(14,965)	(14,699)
Proceeds from termination of derivatives	168,607	44,742
Net cash used in investing activities	(2,856,398)	(2,017,431)
Cash Flows from Financing Activities:
Proceeds from borrowings	11,603,576	11,654,848
Principal repayments on and repurchases of borrowings	(8,751,730)	(8,566,856)
Payment of deferred financing costs	(48,847)	(46,196)
Proceeds from common stock issuances	34,716	697
Payment of equity offering costs	(756)	(27)
Payment of dividends	(442,794)	(414,977)
Contributions from non-controlling interests	21,926	5,590
Distributions to non-controlling interests	(37,847)	(35,235)
Issuance of debt of consolidated VIEs	0	69,399
Repayment of debt of consolidated VIEs	(290,132)	(608,435)
Distributions of cash from consolidated VIEs	64,555	83,785
Net cash provided by financing activities	2,152,667	2,142,593
Net increase (decrease) in cash, cash equivalents and restricted cash	141,003	(336,591)
Cash, cash equivalents and restricted cash, beginning of period	321,914	722,162
Effect of exchange rate changes on cash	(1,637)	(1,783)
Cash, cash equivalents and restricted cash, end of period	461,280	383,788
Supplemental disclosure of cash flow information:
Cash paid for interest	423,326	276,783
Income taxes (refunded) paid, net	(8,613)	7,036
Supplemental disclosure of non-cash investing and financing activities:
Dividends declared, but not yet paid	150,942	140,465
Consolidation of VIEs (VIE asset/liability additions)	4,361,325	4,427,479
Deconsolidation of VIEs (VIE asset/liability reductions)	730,012	935,855
Net assets acquired through foreclosure, control or conversion to equity interest:
Assets acquired, less cash	145,330	36,308
Liabilities assumed	95,796	0
Lease liabilities arising from obtaining right-of-use assets	29,821	0
Loan principal collections temporarily held at master servicer	3,061	119,925
Reclassification of loans held-for-investment to loans held-for-sale	63,962	237,132
Reclassification of loans held-for-sale to loans held-for-investment	0	124,932
Transfer of loans from VIE assets to residential loans upon redemption of consolidated RMBS trusts	0	432,926
Redemption of Class A Units for common stock	0	17,738
Unsettled derivative transactions	$ 0	$ 4,047