Commitments and Contingencies and Other Matters (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Short-term liability
Balance at the beginning of the period	$ 714		$ 2,165
Restructuring charges	1,034	(87)	4,102
Short-term/long-term reclassification	58	659	1,232
Cash payments	(850)	(2,137)	(5,220)
Balance at the end of the period	956	714
Long-term liability
Balance at the beginning of the period			1,620
Short-term/long-term reclassification	(58)	(659)	(1,232)
Personnel severance and related costs
Short-term liability
Restructuring charges	1,034		3,109
Lease-related and other (credits) costs
Short-term liability
Restructuring charges		(87)	993
Long-term liability
Restructuring charges		(48)	377
LED And Solar
Short-term liability
Balance at the beginning of the period			36
Restructuring charges	672		837
Cash payments	(138)	(196)	(677)
Balance at the end of the period	534
LED And Solar \| Personnel severance and related costs
Short-term liability
Restructuring charges	672		647
LED And Solar \| Lease-related and other (credits) costs
Short-term liability
Restructuring charges			190
Data Storage
Short-term liability
Balance at the beginning of the period			270
Restructuring charges	51	(87)	2,629
Short-term/long-term reclassification	58	123	148
Cash payments	(159)	(344)	(2,561)
Balance at the end of the period	128
Long-term liability
Short-term/long-term reclassification	(58)	(123)	(148)
Data Storage \| Personnel severance and related costs
Short-term liability
Restructuring charges	51		1,826
Data Storage \| Lease-related and other (credits) costs
Short-term liability
Restructuring charges		(87)	803
Long-term liability
Restructuring charges		(48)	377
Unallocated Corporate Amount
Short-term liability
Balance at the beginning of the period			1,859
Restructuring charges	311		636
Short-term/long-term reclassification		536	1,084
Cash payments	(553)	(1,597)	(1,982)
Balance at the end of the period	294
Long-term liability
Balance at the beginning of the period			1,620
Short-term/long-term reclassification		(536)	(1,084)
Unallocated Corporate Amount \| Personnel severance and related costs
Short-term liability
Restructuring charges	$ 311		$ 636

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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