Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net income	$ 251,057	$ 422,273	$ 140,414
Adjustments to reconcile net income to net cash provided by operating activities
Satisfaction of management and incentive fees in stock	0	0	19,277
Non-cash compensation expense	33,414	31,647	34,532
Amortization of deferred fees on loans and debt securities	(81,748)	(68,905)	(56,844)
Amortization of deferred financing costs and premiums/discounts on debt obligations	50,020	41,002	37,403
Increase (decrease) in current expected credit loss reserve	211,505	(39,864)	167,653
Unrealized gain on assets denominated in foreign currencies, net	(31)	(6,866)	(3,366)
Unrealized gain on derivative financial instruments, net	(4,339)	(3,934)	(867)
Realized (gain) loss on derivative financial instruments, net	(15,609)	3,890	1,364
Changes in assets and liabilities, net
Other assets	(106,372)	(21,616)	3,352
Other liabilities	58,928	24,856	(6,311)
Net cash provided by operating activities	396,825	382,483	336,607
Cash flows from investing activities
Principal fundings of loans receivable	(6,810,218)	(12,550,463)	(1,896,276)
Principal collections and sales proceeds from loans receivable and debt securities	3,254,595	6,730,339	1,850,003
Origination and exit fees received on loans receivable	74,930	143,002	21,275
Receipts under derivative financial instruments	353,325	76,383	90,427
Payments under derivative financial instruments	(23,057)	(77,772)	(133,430)
Collateral deposited under derivative agreements	(217,220)	(109,670)	(346,640)
Return of collateral deposited under derivative agreements	114,110	160,720	326,390
Net cash used in investing activities	(3,253,535)	(5,627,461)	(88,251)
Cash flows from financing activities
Borrowings under secured debt	5,282,882	12,475,664	2,567,834
Repayments under secured debt	(3,578,806)	(7,801,330)	(4,690,607)
Proceeds from issuance of securitized debt obligations	0	803,750	2,051,875
Repayment of securitized debt obligations	(182,084)	(888,763)	(300,879)
Borrowings under asset-specific debt	770,665	272,065	161,960
Repayments under asset-specific debt	(208,644)	(271,065)	(82,754)
Proceeds from sale of loan participations	245,278	0	0
Net proceeds from issuance of term loans	807,750	298,500	315,438
Repayments of term loans	(17,053)	(13,495)	(9,113)
Net proceeds from issuance of convertible notes	294,000	0	0
Repayment of convertible notes	(402,500)	0	0
Proceeds from issuance of senior secured notes	0	400,000	0
Payment of deferred financing costs	(45,996)	(43,725)	(47,345)
Contributions from non-controlling interests	5,040	55,912	8,431
Distributions to non-controlling interests	(12,573)	(46,632)	(15,024)
Net proceeds from issuance of class A common stock	70,651	638,005	278,322
Dividends paid on class A common stock	(421,386)	(370,662)	(348,907)
Net cash provided by (used in) financing activities	2,607,224	5,508,224	(110,769)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(249,486)	263,246	137,587
Cash, cash equivalents, and restricted cash at beginning of year	551,154	289,970	150,090
Effects of currency translation on cash, cash equivalents, and restricted cash	(10,328)	(2,062)	2,293
Cash, cash equivalents, and restricted cash at end of year	291,340	551,154	289,970
Supplemental disclosure of cash flows information
Payments of interest	(608,259)	(287,715)	(312,093)
(Payments) refunds of income taxes	(676)	73	(232)
Supplemental disclosure of non-cash investing and financing activities
Dividends declared, not paid	(106,455)	(104,271)	(91,004)
Satisfaction of management and incentive fees in stock	0	0	19,277
Loan principal payments held by servicer, net	$ 7,425	$ 17,528	$ 19,460