Quarterly report pursuant to Section 13 or 15(d)

Customer and Supplier Concentrations (Details)

v3.10.0.1
Customer and Supplier Concentrations (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2018
Concentration Risk [Line Items]      
Revenues $ 1,565,090 $ 2,163,790  
Receivables, net 57,332   $ 35,856
Customer concentrations      
Concentration Risk [Line Items]      
Revenues 1,565,090    
Receivables, net $ 57,332   35,856
Concentration risk, percentage 100.00% 100.00%  
Revenue | Customer concentrations      
Concentration Risk [Line Items]      
Revenues $ 631,028 $ 1,048,377  
Concentration risk, percentage 40.30% 48.50%  
Accounts Receivable | Customer concentrations      
Concentration Risk [Line Items]      
Receivables, net $ 32,269   22,435
Concentration risk, percentage 56.30% 62.50%  
HSBC Bank USA | Revenue | Customer concentrations      
Concentration Risk [Line Items]      
Revenues $ 380,122 $ 511,264  
Concentration risk, percentage 24.30% 23.60%  
Mitsubishi Intl. Corp. | Revenue | Customer concentrations      
Concentration Risk [Line Items]      
Revenues $ 250,906 $ 537,113  
Concentration risk, percentage 16.00% 24.90%  
Customer A | Accounts Receivable | Customer concentrations      
Concentration Risk [Line Items]      
Receivables, net $ 25,354   14,967
Concentration risk, percentage 44.20% 41.70%  
Customer B | Accounts Receivable | Customer concentrations      
Concentration Risk [Line Items]      
Receivables, net $ 6,915   $ 7,468
Concentration risk, percentage 12.10% 20.80%