Quarterly report pursuant to Section 13 or 15(d)

Customer and Supplier Concentrations - Summary of Customer and Supplier Concentration of Revenue (Details)

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Customer and Supplier Concentrations - Summary of Customer and Supplier Concentration of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Concentration Risk [Line Items]        
Revenues $ 1,055,590 $ 1,100,912 $ 2,536,604 $ 2,666,002
Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 1,055,590 $ 1,100,912 $ 2,536,604 $ 2,666,002
Concentration risk, percentage 100.00% 100.00% 100.00% 100.00%
Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 223,506 $ 244,871 $ 795,740 $ 624,993
Concentration risk, percentage 21.20% 22.20% 31.40% 23.40%
HSBC Bank USA | Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 126,581 $ 244,871 $ 398,780 $ 624,993
Concentration risk, percentage 12.00% 22.20% 15.80% 23.40%
TD Securities | Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 96,925 $ 0 $ 396,960 $ 0
Concentration risk, percentage 9.20% 0.00% 15.60% 0.00%