XML 76 R54.htm IDEA: XBRL DOCUMENT v3.20.4
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Principles of Consolidation (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Variable Interest Entity [Line Items]    
Assets $ 3,900,106 $ 4,075,969
Liabilities 2,095,458 2,387,666
Variable Interest Entity    
Variable Interest Entity [Line Items]    
Assets 49,200 392,000
Liabilities $ 21,600 $ 255,600