Quarterly report pursuant to Section 13 or 15(d)

Inventories (Summary of Inventories) (Details)

v3.6.0.2
Inventories (Summary of Inventories) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Jun. 30, 2016
Inventory [Line Items]    
Inventories $ 169,457 $ 185,699
Restricted inventories 121,466 59,358
Restricted and Nonrestricted Inventory, Net 290,923 245,057
Inventory held for sale    
Inventory [Line Items]    
Inventories 69,054 81,006
Repurchase arrangements with customers    
Inventory [Line Items]    
Inventories 91,034 92,283
Consignment arrangements with customers    
Inventory [Line Items]    
Inventories 5,864 8,042
Commemorative coins, held at lower of cost or market    
Inventory [Line Items]    
Inventories 34 16
Borrowed precious metals from suppliers    
Inventory [Line Items]    
Inventories 3,471 4,352
Product financing arrangement, restricted    
Inventory [Line Items]    
Restricted inventories $ 121,466 $ 59,358