Variable Interest Entities - Schedule of Consolidated VIEs (Details) - USD ($) $ in Thousands		Mar. 31, 2022		Dec. 31, 2021		Mar. 31, 2021
Assets:
Restricted cash and restricted cash equivalents		$ 377,077	[1]	$ 273,726	[1]	$ 347,284
Loans	[1]	7,222,001		6,068,884
Total assets		12,246,576		9,176,326
Liabilities:
Accounts payable, accruals and other liabilities	[1]	437,319		298,164
Debt	[1]	4,916,175		3,947,983
Residual interests classified as debt	[1]	70,532		93,682
Total liabilities		6,715,903		4,478,623
Variable Interest Entity, Primary Beneficiary
Assets:
Restricted cash and restricted cash equivalents		40,906		53,161
Loans		690,557		808,904
Total assets		731,463		862,065
Liabilities:
Accounts payable, accruals and other liabilities		344		388
Debt		576,897		660,419
Residual interests classified as debt		70,532		93,682
Total liabilities		$ 647,773		$ 754,489

[1] Financial statement line items include amounts in consolidated variable interest entities (“VIEs”). See Note 5.(2)As of March 31, 2022 and December 31, 2021, includes loans held for sale measured at fair value of $7,002,885 and $5,952,972, respectively.