Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Net income (loss)	$ 122,526	$ (66,269)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization of deferred financing costs, premiums and discounts on secured borrowings	10,515	9,634
Amortization of discounts and deferred financing costs on unsecured senior notes	1,726	1,962
Accretion of net discount on investment securities	(3,476)	(2,783)
Accretion of net deferred loan fees and discounts	(16,745)	(12,080)
Share-based compensation	10,310	8,800
Manager fees paid in stock	7,486	9,080
Change in fair value of investment securities	306	(2,504)
Change in fair value of consolidated VIEs	(7,042)	80,683
Change in fair value of servicing rights	796	393
Change in fair value of loans	9,478	16,134
Change in fair value of derivatives	(34,768)	(7,617)
Foreign currency loss, net	11,681	34,486
Gain on sale of investments and other assets	(17,693)	(296)
Credit loss provision, net	44	48,669
Depreciation and amortization	22,528	23,864
Earnings from unconsolidated entities	(1,734)	(97)
Distributions of earnings from unconsolidated entities	17	27
Loss on extinguishment of debt	516	170
Origination and purchase of loans held-for-sale, net of principal collections	(327,352)	(621,832)
Proceeds from sale of loans held-for-sale	571,927	751,140
Changes in operating assets and liabilities:
Related-party payable, net	(3,035)	(1,659)
Accrued and capitalized interest receivable, less purchased interest	(41,833)	(31,465)
Other assets	(19,467)	(40,944)
Accounts payable, accrued expenses and other liabilities	(25,945)	(6,764)
Net cash provided by operating activities	270,766	190,732
Cash Flows from Investing Activities:
Origination and purchase of loans held-for-investment	(2,296,124)	(1,252,745)
Proceeds from principal collections on loans	1,051,695	812,187
Proceeds from loans sold		39,019
Purchase and funding of investment securities		(5,729)
Proceeds from sales of investment securities		7,940
Proceeds from principal collections on investment securities	59,514	13,559
Proceeds from sales of real estate	30,566
Purchases and additions to properties and other assets	(3,512)	(7,056)
Investment in unconsolidated entities		(3,100)
Distribution of capital from unconsolidated entities	15,980	153
Payments for purchase or termination of derivatives	(851)	(67,323)
Proceeds from termination of derivatives	23,527	8,912
Net cash used in investing activities	(1,119,205)	(454,183)
Cash Flows from Financing Activities:
Proceeds from borrowings	2,748,317	2,756,915
Principal repayments on and repurchases of borrowings	(2,001,336)	(1,923,754)
Payment of deferred financing costs	(5,052)	(3,577)
Proceeds from common stock issuances	262	153
Payment of equity offering costs	(22)	(14)
Payment of dividends	(137,667)	(135,889)
Contributions from non-controlling interests	2,969	9,406
Distributions to non-controlling interests	(8,833)	(66,476)
Purchase of treasury stock		(28,830)
Issuance of debt of consolidated VIEs	11,604	24,376
Repayment of debt of consolidated VIEs	(27,490)	(36,953)
Distributions of cash from consolidated VIEs	14,481	24,723
Net cash provided by financing activities	597,233	620,080
Net (decrease) increase in cash, cash equivalents and restricted cash	(251,206)	356,629
Cash, cash equivalents and restricted cash, beginning of year	722,162	574,031
Effect of exchange rate changes on cash	(1,042)	733
Cash, cash equivalents and restricted cash, end of year	469,914	931,393
Supplemental disclosure of cash flow information:
Cash paid for interest	80,624	109,341
Income taxes paid	425	569
Supplemental disclosure of non-cash investing and financing activities:
Dividends declared, but not yet paid	139,113	135,994
Consolidation of VIEs (VIE asset/liability additions)	393,373	2,477,422
Reclassification of loans held-for-investment to loans held-for-sale	166,901	422,691
Reclassification of loans held-for-sale to loans held-for-investment	124,935
Loan principal collections temporarily held at master servicer	7,320
Net assets acquired through conversion to equity interest	31,965	9,779
Redemption of Class A Units for common stock	$ 1,039	$ 8,538