Quarterly report pursuant to Section 13 or 15(d)

Inventories (Narrative) (Details)

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Inventories (Narrative) (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Mar. 31, 2019
Jun. 30, 2018
Inventory [Line Items]    
Inventory held for sale [1] $ 200,696 $ 166,176
Precious metals inventory subject to repurchase arrangements 89,700 104,900
Consignment arrangements with customers 4,400 10,800
Commemorative coins, held at lower of cost or market 33 99
Borrowed precious metals from suppliers 17,500 17,800
Product financing arrangement, restricted 65,700 113,900
Unrealized gains (losses) included in inventory balance (1,900) (5,400)
Premium on metals position 5,372 3,530
Inventory held for sale    
Inventory [Line Items]    
Inventory held for sale $ 89,106 $ 32,605
[1] Includes amounts of the consolidated variable interest entity, which is presented separately in the table below.