Variable Interest Entities - Assets and Liabilities of Consolidated CLO (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets:
Total Assets	$ 79,556,279	$ 78,042,336
Liabilities
Liabilities	74,691,483	72,905,322
Primary beneficiary
Assets:
Total Assets	64,175,387	62,187,175
Liabilities
Liabilities	62,617,975	60,743,494
Collateralized Loan Obligation | Primary beneficiary
Assets:
Loans held-for-investment, net	1,099,405	1,073,504
Accrued interest receivable	1,875	3,129
Other assets	558	26,496
Total Assets	1,101,838	1,103,129
Liabilities
Accounts payable, accrued expenses and other liabilities	635	1,362
Collateralized loan obligations, net	929,307	928,060
Liabilities	$ 929,942	$ 929,422