Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 422,273	$ 140,414	$ 307,393
Adjustments to reconcile net income to net cash provided by operating activities
Satisfaction of management and incentive fees in stock	0	19,277	0
Non-cash compensation expense	31,647	34,532	30,656
Amortization of deferred fees on loans and debt securities	(68,905)	(56,844)	(57,926)
Amortization of deferred financing costs and premiums/ discount on debt obligations	41,002	37,403	32,195
(Decrease) increase in current expected credit loss reserve	(39,864)	167,653	0
Unrealized (gain) loss on assets denominated in foreign currencies, net	(6,866)	(3,366)	881
Unrealized (gain) loss on derivative financial instruments, net	(3,934)	(867)	(1,071)
Realized loss (gain) on derivative financial instruments, net	3,890	1,364	11
Changes in assets and liabilities, net
Other assets	(21,616)	3,352	(7,355)
Other liabilities	24,856	(6,311)	(747)
Net cash provided by operating activities	382,483	336,607	304,037
Cash flows from investing activities
Principal fundings of loans receivable	(12,550,463)	(1,896,276)	(6,890,249)
Principal collections and sales proceeds from loans receivable and debt securities	6,730,339	1,850,003	4,940,194
Origination and exit fees received on loans receivable	143,002	21,275	66,558
Receipts under derivative financial instruments	76,383	90,427	49,673
Payments under derivative financial instruments	(77,772)	(133,430)	(6,524)
Collateral deposited under derivative agreements	(109,670)	(346,640)	(59,720)
Return of collateral deposited under derivative agreements	160,720	326,390	28,920
Net cash used in investing activities	(5,627,461)	(88,251)	(1,871,148)
Cash flows from financing activities
Borrowings under secured debt	12,475,664	2,567,834	6,322,165
Repayments under secured debt	(7,801,330)	(4,690,607)	(5,526,989)
Proceeds from issuance of securitized debt obligations	803,750	2,051,875	0
Repayment of securitized debt obligations	(888,763)	(300,879)	(102,478)
Borrowings under asset-specific debt	272,065	161,960	247,295
Repayments under asset-specific debt	(271,065)	(82,754)	0
Proceeds from sale of loan participations	0	0	21,346
Repayment of loan participations	0	0	(115,874)
Net proceeds from issuance of term loans	298,500	315,438	748,414
Repayments of term loans	(13,495)	(9,113)	(3,122)
Proceeds from issuance of senior secured notes	400,000	0	0
Payment of deferred financing costs	(43,725)	(47,345)	(39,370)
Contributions from non-controlling interests	55,912	8,431	51,418
Distributions to non-controlling interests	(46,632)	(15,024)	(41,629)
Net proceeds from issuance of class A common stock	638,005	278,322	372,337
Dividends paid on class A common stock	(370,662)	(348,907)	(320,961)
Net cash provided by (used in) financing activities	5,508,224	(110,769)	1,612,552
Net increase in cash and cash equivalents	263,246	137,587	45,441
Cash and cash equivalents at beginning of year	289,970	150,090	105,662
Effects of currency translation on cash and cash equivalents	(2,062)	2,293	(1,013)
Cash and cash equivalents at end of year	551,154	289,970	150,090
Supplemental disclosure of cash flows information
Payments of interest	(287,715)	(312,093)	(425,801)
Receipts (payments) of income taxes	73	(232)	109
Supplemental disclosure of non-cash investing and financing activities
Dividends declared, not paid	(104,271)	(91,004)	(83,702)
Satisfaction of management and incentive fees in stock	0	19,277	0
Loan principal payments held by servicer, net	$ 17,528	$ 19,460	$ 49,584