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Commitments, Contingencies and Other Matters (Details 2) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Reconciliation of short-term liability    
Balance at the beginning of the period $ 1,875 $ 956
Restructuring 1,771 2,693
Cash payments (2,145) (1,774)
Balance at the end of the period 1,501 1,875
LED And Solar
   
Reconciliation of short-term liability    
Balance at the beginning of the period 448 534
Restructuring 1,149 874
Cash payments (946) (960)
Balance at the end of the period 651 448
Data Storage
   
Reconciliation of short-term liability    
Balance at the beginning of the period 1,308 128
Restructuring 564 1,684
Cash payments (1,032) (504)
Balance at the end of the period 840 1,308
Unallocated Corporate Amount
   
Reconciliation of short-term liability    
Balance at the beginning of the period 119 294
Restructuring 58 135
Cash payments (167) (310)
Balance at the end of the period $ 10 $ 119