Variable Interest Entities - Assets and Liabilities of Consolidated CLO (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Cash and cash equivalents	$ 351,190	$ 563,217
Loans held-for-investment, net	12,321,493	11,087,073
Accrued interest receivable	101,713	95,980
Other assets	208,873	190,748
Total Assets	79,702,323	80,873,509
Accounts payable, accrued expenses and other liabilities	178,215	206,845
Collateralized loan obligations, net	931,178	930,554
Liabilities	74,847,538	76,010,933
Primary beneficiary
Assets:
Total Assets	62,367,110	64,238,328
Liabilities	60,896,709	62,776,371
Collateralized Loan Obligation | Primary beneficiary
Assets:
Cash and cash equivalents		96,998
Total Assets	1,104,014	1,105,450
Liabilities	931,818	931,217
Accounts payable, accrued expenses and other liabilities	640	663
Loans held-for-investment, net	1,099,639	1,002,441
Collateralized loan obligations, net	931,178	930,554
Accrued interest receivable	4,068	5,454
Other assets	$ 307	$ 557