Quarterly report pursuant to Section 13 or 15(d)

Customer and Supplier Concentrations (Details)

v3.8.0.1
Customer and Supplier Concentrations (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Concentration Risk [Line Items]        
Revenues $ 1,680,738 $ 2,126,361 $ 3,844,528 $ 3,932,014
Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 1,680,738 $ 2,126,361 $ 3,844,528 $ 3,932,014
Concentration risk, percentage 100.00% 100.00% 100.00% 100.00%
Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 790,270 $ 768,536 $ 1,838,647 $ 1,479,216
Concentration risk, percentage 47.00% 36.10% 47.80% 37.60%
HSBC Bank USA | Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 407,509 $ 467,688 $ 918,773 $ 974,475
Concentration risk, percentage 24.20% 22.00% 23.90% 24.80%
Mitsubishi Intl. Corp. | Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 382,761 $ 300,848 $ 919,874 $ 504,741
Concentration risk, percentage 22.80% 14.10% 23.90% 12.80%