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Inventories (Details) (USD $)
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9 Months Ended | ||
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Mar. 31, 2014
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Mar. 31, 2013
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Jun. 30, 2013
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| Inventory Disclosure [Abstract] | |||
| Premium on metals position | $ 3,435,000 | $ 1,787,000 | |
| Premium on inventory | 5,239,000 | 1,787,000 | |
| Commemorative coin inventory, held at lower of cost or market | 1,804,000 | 0 | |
| Unrealized gains (losses) included in inventory balance | 3,100,000 | 3,800,000 | |
| Borrowed metals | 8,600,000 | 20,100,000 | |
| Product under financing arrangement | 49,700,000 | 38,600,000 | |
| Inventories loaned under consignment | $ 7,800,000 | $ 2,600,000 | |
| X | ||||||||||
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- Definition
Borrowed Metals No definition available.
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- Definition
Inventory Purchase Premium On Metals Position, marked to market No definition available.
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- Definition
Inventory Purchase Premium On Metals Position,_stated_at_lower_cost_or_market No definition available.
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| X | ||||||||||
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- Definition
Inventory Purchase Premium On Metals Position No definition available.
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| X | ||||||||||
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- Definition
Inventory, Unrealized Gains/(Losses) Resulting from Market Value and Cost of Physical Inventory No definition available.
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| X | ||||||||||
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- Definition
Product under Financing Arrangement No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Gross amount of inventory owned by the entity but in the hands of a customer, typically a reseller. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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