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INVENTORIES (Schedule of Service Parts Inventories) (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Mar. 31, 2013
--- | --- | ---
Service parts inventories: |  |
Finished goods | $ 19,538 | $ 19,750
Component parts | 12,338 | 15,618
Inventory, Parts and Components, Net of Reserves | $ 31,876 | $ 35,368

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- Definition Carrying amount as of the balance sheet date of service parts inventories. + References No definition available. + Details
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Namespace Prefix: | qtm_
Data Type: | xbrli:monetaryItemType
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- Definition Carrying amount as of the balance sheet date of component parts held by the company as service parts. + References No definition available. + Details
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Balance Type: | debit
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- Definition Carrying amount as of the balance sheet date of finished goods held by the company as service parts. + References No definition available. + Details
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Namespace Prefix: | qtm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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