Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net income	$ 249,897	$ 251,057	$ 422,273
Adjustments to reconcile net income to net cash provided by operating activities
Non-cash compensation expense	30,655	33,414	31,647
Amortization of deferred fees on loans and debt securities	(78,428)	(81,748)	(68,905)
Amortization of deferred financing costs and premiums/discounts on debt obligations	54,264	50,020	41,002
Payment-in-kind interest, net of interest received	(2,865)	0	0
Increase (decrease) in current expected credit loss reserve	249,790	211,505	(39,864)
Gain on extinguishment of debt	(4,616)	0	0
Unrealized gain on assets denominated in foreign currencies, net	0	(31)	(6,866)
Unrealized loss (gain) on derivative financial instruments, net	2,769	(4,339)	(3,934)
Realized (gain) loss on derivative financial instruments, net	(28,202)	(15,609)	3,890
Changes in assets and liabilities, net
Other assets	(20,666)	(106,372)	(21,616)
Other liabilities	6,243	58,928	24,856
Net cash provided by operating activities	458,841	396,825	382,483
Cash flows from investing activities
Principal fundings of loans receivable	(1,344,130)	(6,810,218)	(12,550,463)
Principal collections, sales proceeds, and cost-recovery proceeds from loans receivable and debt securities	2,840,467	3,254,595	6,730,339
Origination and other fees received on loans receivable	17,992	74,930	143,002
Payments under derivative financial instruments	(233,544)	(23,057)	(77,772)
Receipts under derivative financial instruments	163,682	353,325	76,383
Collateral deposited under derivative agreements	(352,120)	(217,220)	(109,670)
Return of collateral deposited under derivative agreements	351,730	114,110	160,720
Net cash provided by (used in) investing activities	1,444,077	(3,253,535)	(5,627,461)
Cash flows from financing activities
Borrowings under secured debt	1,636,899	5,282,882	12,475,664
Repayments under secured debt	(2,742,450)	(3,578,806)	(7,801,330)
Proceeds from issuance of securitized debt obligations	0	0	803,750
Repayments of securitized debt obligations	(166,027)	(182,084)	(888,763)
Borrowings under asset-specific debt	292,019	770,665	272,065
Repayments under asset-specific debt	(239,037)	(208,644)	(271,065)
Proceeds from sale of loan participations	100,692	245,278	0
Net proceeds from term loan borrowings	0	807,750	298,500
Repayments of term loans	(21,997)	(17,053)	(13,495)
Proceeds from issuance of senior secured notes	0	0	400,000
Repurchases of senior secured notes	(28,945)	0	0
Net proceeds from issuance of convertible notes	0	294,000	0
Repayment of convertible notes	(220,000)	(402,500)	0
Payment of deferred financing costs	(23,215)	(45,996)	(43,725)
Contributions from non-controlling interests	0	5,040	55,912
Distributions to non-controlling interests	(8,955)	(12,573)	(46,632)
Net proceeds from issuance of class A common stock	0	70,651	638,005
Dividends paid on class A common stock	(426,927)	(421,386)	(370,662)
Net cash (used in) provided by financing activities	(1,847,943)	2,607,224	5,508,224
Net increase (decrease) in cash and cash equivalents	54,975	(249,486)	263,246
Cash and cash equivalents at beginning of year	291,340	551,154	289,970
Effects of currency translation on cash and cash equivalents	3,699	(10,328)	(2,062)
Cash and cash equivalents at end of year	350,014	291,340	551,154
Supplemental disclosure of cash flows information
Payments of interest	(1,292,958)	(608,259)	(287,715)
Payments of income taxes	(6,668)	(676)	73
Supplemental disclosure of non-cash investing and financing activities
Dividends declared, not paid	(107,390)	(106,455)	(104,271)
Loan principal payments held by servicer, net	$ 48,287	$ 7,425	$ 17,528