Quarterly report pursuant to Section 13 or 15(d)

Inventories (Summary of Inventories) (Details)

v3.5.0.2
Inventories (Summary of Inventories) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Jun. 30, 2016
Inventory [Line Items]    
Inventories $ 179,826 $ 185,699
Restricted inventories 117,789 59,358
Restricted and Nonrestricted Inventory, Net 297,615 245,057
Inventory held for sale    
Inventory [Line Items]    
Inventories 62,000 81,006
Repurchase arrangements with customers    
Inventory [Line Items]    
Inventories 101,941 92,283
Consignment arrangements with customers    
Inventory [Line Items]    
Inventories 11,682 8,042
Commemorative coins, held at lower of cost or market    
Inventory [Line Items]    
Inventories 7 16
Borrowed precious metals from suppliers    
Inventory [Line Items]    
Inventories 4,196 4,352
Product financing arrangement, restricted    
Inventory [Line Items]    
Restricted inventories $ 117,789 $ 59,358