Quarterly report pursuant to Section 13 or 15(d)

Customer and Supplier Concentrations (Details)

v3.6.0.2
Customer and Supplier Concentrations (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Concentration Risk [Line Items]          
Revenues $ 2,126,361 $ 1,529,143 $ 3,932,014 $ 3,536,079  
Receivables, net 81,945   81,945   $ 43,302
Customer concentrations          
Concentration Risk [Line Items]          
Revenues 2,126,361 $ 1,529,143 3,932,014 $ 3,536,079  
Receivables, net $ 81,945   $ 81,945   $ 43,302
Concentration risk, percentage 100.00% 100.00% 100.00% 100.00% 100.00%
Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 998,005 $ 480,355 $ 1,845,267 $ 1,121,697  
Concentration risk, percentage 46.90% 31.40% 46.90% 31.80%  
Account Receivable | Customer concentrations          
Concentration Risk [Line Items]          
Receivables, net $ 65,278   $ 65,278   $ 0
Concentration risk, percentage     79.70%   0.00%
HSBC Bank USA | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 467,688 $ 281,473 $ 974,475 $ 615,026  
Concentration risk, percentage 22.00% 18.40% 24.80% 17.40%  
Mitsubishi Intl. Corp. | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 300,848 $ 82,757 $ 504,741 $ 217,975  
Concentration risk, percentage 14.10% 5.40% 12.80% 6.20%  
US Mint | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 229,469 $ 116,125 $ 366,051 $ 288,696  
Concentration risk, percentage 10.80% 7.60% 9.30% 8.20%  
Customer A | Account Receivable | Customer concentrations          
Concentration Risk [Line Items]          
Receivables, net $ 65,278   $ 65,278   $ 0
Concentration risk, percentage     79.70%   0.00%