Annual report pursuant to Section 13 and 15(d)

Inventories (Summary of Inventories) (Details)

v3.7.0.1
Inventories (Summary of Inventories) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Inventory [Line Items]    
Inventories $ 149,316 $ 185,699
Restricted inventories 135,343 59,358
Restricted and Nonrestricted Inventory, Net 284,659 245,057
Inventory held for sale    
Inventory [Line Items]    
Inventories 43,787 81,006
Repurchase arrangements with customers    
Inventory [Line Items]    
Inventories 92,496 92,283
Consignment arrangements with customers    
Inventory [Line Items]    
Inventories 7,368 8,042
Commemorative coins, held at lower of cost or market    
Inventory [Line Items]    
Inventories 40 16
Borrowed precious metals from suppliers    
Inventory [Line Items]    
Inventories 5,625 4,352
Product financing arrangement, restricted    
Inventory [Line Items]    
Restricted inventories $ 135,343 $ 59,358