Quarterly report pursuant to Section 13 or 15(d)

Restructuring Charges (Details)

v3.20.2
Restructuring Charges (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
numberOfPositions
Sep. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
numberOfPositions
Sep. 30, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]          
Factor by which the average annual base management fee is multiplied for purposes of determining the management agreement termination fee | numberOfPositions 3     3  
Period over which the average annual base management fee is calculated for purposes of determining the management agreement termination fee       24 months  
Restructuring charges $ (139,788) $ 0   $ 6,000 $ 0
Restructuring Reserve [Roll Forward]          
Accrued restructuring costs at beginning of period 142,317   $ 0 0  
Costs incurred and charged to expense 0     145,788  
Costs paid (2,235)     (5,706)  
Non-cash adjustments (139,788)     (139,788)  
Accrued restructuring costs at end of period $ 294   142,317 $ 294  
Contract Termination [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges     $ 139,800