Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows from Operating Activities:
Net income	$ 384,314	$ 122,526
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred financing costs, premiums and discounts on secured borrowings	11,816	10,515
Amortization of discounts and deferred financing costs on unsecured senior notes	2,151	1,726
Accretion of net discount on investment securities	(3,475)	(3,476)
Accretion of net deferred loan fees and discounts	(16,600)	(16,745)
Share-based compensation	10,093	10,310
Manager fees paid in stock	25,417	7,486
Change in fair value of investment securities	355	306
Change in fair value of consolidated VIEs	11,928	(7,042)
Change in fair value of servicing rights	(1,084)	796
Change in fair value of loans	125,783	9,478
Change in fair value of affordable housing fund investments	(223,851)	0
Change in fair value of derivatives	(129,343)	(34,768)
Foreign currency loss, net	27,281	11,681
Gain on sale of investments and other assets	(98,468)	(17,693)
Impairment charges on properties and related intangibles	55	0
Credit loss (reversal) provision, net	(3,658)	44
Depreciation and amortization	12,757	22,528
Loss (earnings) from unconsolidated entities	910	(1,734)
Distributions of earnings from unconsolidated entities	280	17
Loss on extinguishment of debt	624	516
Origination and purchase of loans held-for-sale, net of principal collections	(2,206,360)	(327,352)
Proceeds from sale of loans held-for-sale	2,278,467	571,927
Changes in operating assets and liabilities:
Related-party payable, net	(19,756)	(3,035)
Accrued and capitalized interest receivable, less purchased interest	(35,342)	(41,833)
Other assets	(64,229)	(19,467)
Accounts payable, accrued expenses and other liabilities	64,309	(25,945)
Net cash provided by operating activities	154,374	270,766
Cash Flows from Investing Activities:
Origination, purchase and funding of loans held-for-investment	(1,557,821)	(2,296,124)
Proceeds from principal collections on loans	798,969	1,051,695
Purchase and funding of investment securities	(18,139)	0
Proceeds from principal collections on investment securities	7,784	59,514
Proceeds from sales of real estate	147,334	30,566
Purchases and additions to properties and other assets	(6,604)	(3,512)
Investments in unconsolidated entities	(461)	0
Distribution of capital from unconsolidated entities	121	15,980
Payments for purchase or termination of derivatives	(8,541)	(851)
Proceeds from termination of derivatives	82,596	23,527
Net cash used in investing activities	(554,762)	(1,119,205)
Cash Flows from Financing Activities:
Proceeds from borrowings	5,843,167	2,748,317
Principal repayments on and repurchases of borrowings	(5,153,638)	(2,001,336)
Payment of deferred financing costs	(21,998)	(5,052)
Proceeds from common stock issuances	251	262
Payment of equity offering costs	(89)	(22)
Payment of dividends	(146,709)	(137,667)
Contributions from non-controlling interests	4,690	2,969
Distributions to non-controlling interests	(10,718)	(8,833)
Issuance of debt of consolidated VIEs	0	11,604
Repayment of debt of consolidated VIEs	(84,460)	(27,490)
Distributions of cash from consolidated VIEs	22,014	14,481
Net cash provided by financing activities	452,510	597,233
Net increase (decrease) in cash, cash equivalents and restricted cash	52,122	(251,206)
Cash, cash equivalents and restricted cash, beginning of period	321,914	722,162
Effect of exchange rate changes on cash	(262)	(1,042)
Cash, cash equivalents and restricted cash, end of period	373,774	469,914
Supplemental disclosure of cash flow information:
Cash paid for interest	102,300	80,624
Income taxes paid	566	425
Supplemental disclosure of non-cash investing and financing activities:
Dividends declared, but not yet paid	148,998	139,113
Consolidation of VIEs (VIE asset/liability additions)	1,109,614	393,373
Deconsolidation of VIEs (VIE asset/liability reductions)	730,012	0
Reclassification of loans held-for-investment to loans held-for-sale	346	166,901
Reclassification of loans held-for-sale to loans held-for-investment	0	124,935
Loan principal collections temporarily held at master servicer	42,225	31,965
Net assets acquired through foreclosure, control or conversion to equity interest	0	7,320
Redemption of Class A Units for common stock	$ 0	$ 1,039