Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Customer and Supplier Concentrations - Summary of Customer and Supplier Concentration of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2018
Concentration Risk [Line Items]          
Revenues $ 1,266,986 $ 1,994,963 $ 3,932,988 $ 5,839,491  
Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 1,266,986 $ 1,994,963 $ 3,932,988 $ 5,839,491  
Concentration risk, percentage 100.00% 100.00% 100.00% 100.00% 100.00%
Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 425,496 $ 1,008,093 $ 1,405,419 $ 2,846,740  
Concentration risk, percentage 33.60% 50.50% 35.70% 48.70%  
HSBC Bank USA | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 347,966 $ 606,966 $ 972,958 $ 1,525,739  
Concentration risk, percentage 27.50% 30.40% 24.70% 26.10%  
Mitsubishi Intl. Corp. | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 77,530 $ 401,127 $ 432,461 $ 1,321,001  
Concentration risk, percentage 6.10% 20.10% 11.00% 22.60%