Quarterly report pursuant to Section 13 or 15(d)

Customer and Supplier Concentration (Details)

v3.3.1.900
Customer and Supplier Concentration (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2015
Concentration Risk [Line Items]          
Revenues $ 1,529,143 $ 1,538,871 $ 3,536,079 $ 2,992,337  
Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 1,529,143 $ 1,538,871 $ 3,536,079 $ 2,992,337  
Concentration risk, percentage 100.00% 100.00% 100.00% 100.00%  
Accounts receivable | Customer concentrations          
Concentration Risk [Line Items]          
Total accounts receivable, net $ 22,557   $ 22,557   $ 30,025
Concentration risk, percentage     100.00%   100.00%
United Overseas Bank Limited | Accounts receivable | Customer concentrations          
Concentration Risk [Line Items]          
Total accounts receivable, net 2,458   $ 2,458   $ 0
Concentration risk, percentage     10.90%   0.00%
Jerrit Canyon | Accounts receivable | Customer concentrations          
Concentration Risk [Line Items]          
Total accounts receivable, net 3,042   $ 3,042   $ 1,435
Concentration risk, percentage     13.50%   4.80%
HSBC Bank USA | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 281,473 $ 448,453 $ 615,026 $ 982,991  
Concentration risk, percentage 18.40% 29.10% 17.40% 32.90%  
United States Mint | Accounts receivable | Customer concentrations          
Concentration Risk [Line Items]          
Total accounts receivable, net $ 7,367   $ 7,367   $ 9,781
Concentration risk, percentage     32.70%   32.60%
JM Bullion | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 157,087 $ 116,082 $ 403,956 $ 182,647  
Concentration risk, percentage 10.30% 7.50% 11.40% 6.10%  
Major Customers | Revenue | Customer concentrations          
Concentration Risk [Line Items]          
Revenues $ 438,560 $ 564,535 $ 1,018,982 $ 1,165,638  
Concentration risk, percentage 28.70% 36.60% 28.80% 39.00%  
Major Customers | Accounts receivable | Customer concentrations          
Concentration Risk [Line Items]          
Total accounts receivable, net $ 12,867   $ 12,867   $ 11,216
Concentration risk, percentage     57.10%   37.40%