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Segment Information (Details 2) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of Segment goodwill and total assets to Consolidated goodwill and total assets
Goodwill	$ 67,107	$ 52,003	$ 52,003
Total assets	1,120,443	1,148,034
Led And Solar
Reconciliation of Segment goodwill and total assets to Consolidated goodwill and total assets
Goodwill	67,107	52,003
Total assets	352,739	323,096
Data Storage
Reconciliation of Segment goodwill and total assets to Consolidated goodwill and total assets
Total assets	59,563	61,691
Unallocated Corporate Amount
Reconciliation of Segment goodwill and total assets to Consolidated goodwill and total assets
Total assets	$ 708,141	$ 763,247

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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