XML 39 R30.htm IDEA: XBRL DOCUMENT v3.20.1
Variable Interest Entities - Textual (Details) - Consolidated VIEs - entity
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Variable Interest Entity [Line Items]    
Number of consolidated limited partnership-like entities 9 8
Minimum    
Variable Interest Entity [Line Items]    
Ownership interest in consolidated entities (percent) 50.00% 50.00%
Maximum    
Variable Interest Entity [Line Items]    
Ownership interest in consolidated entities (percent) 75.00% 75.00%