Schedule IV - Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconcile mortgage loans on real estate
Balance at beginning	$ 10,007,232	$ 7,311,740	$ 4,100,064
CECL Day 1 adjustment			4,815,604
Origination of loan receivables	1,567,134	4,025,598	212,848
Purchases of loan receivables	42,148	669,137
Loan receivables from issuance of securitized debt obligation	689,079
Proceeds from disposition and principal payment of loan receivables	(2,359,299)	(2,385,492)	(1,954,567)
Loans acquired as part of merger transactions	764,367	(412,745)	(102,798)
Net realized gain (loss) on sale of loan receivables	25,330	12,218	40,580
Net unrealized gain (loss) on loan receivables	8,409	(19,675)	3,014
Accretion/amortization of discount, premium and other fees	34,245	14,618	13,232
Foreign currency gain (loss), net	(2,645)	(1,165)	(4,091)
Transfers to real estate owned, held for sale	(56,900)	(1,598)	(9,015)
Provision for loan losses	(11,306)	(30,894)	(8,727)
Balance at Ending	10,713,084	10,007,232	7,311,740
Loans, net
Reconcile mortgage loans on real estate
Balance at beginning	9,883,497	6,994,728	4,020,223
CECL Day 1 adjustment			3,826,182
Origination of loan receivables	1,005,137	3,303,318	137,182
Purchases of loan receivables	42,148	669,137
Loan receivables from issuance of securitized debt obligation	689,079
Proceeds from disposition and principal payment of loan receivables	(1,779,990)	(1,471,118)	(973,111)
Loans acquired as part of merger transactions	764,367	(412,745)
Net realized gain (loss) on sale of loan receivables	(9,661)	(9,281)	(7,317)
Net unrealized gain (loss) on loan receivables	(437)	(980)	170
Accretion/amortization of discount, premium and other fees	34,245	14,618	13,232
Foreign currency gain (loss), net	(2,645)	(1,165)	(4,091)
Transfers	(68,661)	(3,987)
Transfers to real estate owned, held for sale	(56,900)	(1,598)	(9,015)
Provision for loan losses	(11,306)	(30,894)	(8,727)
Balance at Ending	10,631,485	9,883,497	6,994,728
Loans, held for sale, at fair value
Reconcile mortgage loans on real estate
Balance at beginning	123,735	317,012	79,841
CECL Day 1 adjustment			989,422
Origination of loan receivables	561,997	722,280	75,666
Proceeds from disposition and principal payment of loan receivables	(579,309)	(914,374)	(981,456)
Loans acquired as part of merger transactions			(102,798)
Net realized gain (loss) on sale of loan receivables	34,991	21,499	47,897
Net unrealized gain (loss) on loan receivables	8,846	(18,695)	2,844
Transfers	68,661	3,987
Balance at Ending	$ 81,599	$ 123,735	$ 317,012