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Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2012 | Sep. 29, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Oct. 01, 2011 | Jul. 02, 2011 | Apr. 02, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008
Leases |  |  |  |  |  |  |  |  |  |  |  |  |
Total rental expense under operating leases |  |  |  |  |  |  |  |  | $ 29,667 | $ 26,351 | $ 28,194 |  |
Future minimum lease payments for operating leases [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2013 | 24,991 |  |  |  |  |  |  |  | 24,991 |  |  |  |
2014 | 20,814 |  |  |  |  |  |  |  | 20,814 |  |  |  |
2015 | 17,411 |  |  |  |  |  |  |  | 17,411 |  |  |  |
2016 | 12,709 |  |  |  |  |  |  |  | 12,709 |  |  |  |
2017 | 10,216 |  |  |  |  |  |  |  | 10,216 |  |  |  |
Thereafter | 17,939 |  |  |  |  |  |  |  | 17,939 |  |  |  |
Capital lease obligations | 39 |  |  |  |  |  |  |  | 39 |  |  |  |
Environmental Matters |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued environmental liabilities | 24,573 |  |  |  |  |  |  |  | 24,573 |  |  |  |
Accrued environmental liabilities, current | 11,650 |  |  |  |  |  |  |  | 11,650 |  |  |  |
Accrued environmental liabilities, noncurrent | 12,923 |  |  |  |  |  |  |  | 12,923 |  |  |  |
Estimated purchase commitments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2013 | 36,776 |  |  |  |  |  |  |  | 36,776 |  |  |  |
2014 | 40,319 |  |  |  |  |  |  |  | 40,319 |  |  |  |
2015 | 45,030 |  |  |  |  |  |  |  | 45,030 |  |  |  |
2016 | 46,303 |  |  |  |  |  |  |  | 46,303 |  |  |  |
2017 | 35,461 |  |  |  |  |  |  |  | 35,461 |  |  |  |
Actual purchases from subcontractors |  |  |  |  |  |  |  |  | 36,419 |  |  |  |
Executive Employment Agreements |  |  |  |  |  |  |  |  |  |  |  |  |
Period of royalty payment following termination of employment (in years) |  |  |  |  |  |  |  |  | 10 |  |  |  |
Royalty Payment Percentage (in hundredths) |  |  |  |  |  |  |  |  | 5.00% |  |  |  |
Present value of royalties, minimum |  |  |  |  |  |  |  |  |  |  |  |  | 370,000
Present value of royalties, maximum |  |  |  |  |  |  |  |  |  |  |  |  | 445,000
Executive payment made upon amended and restated agreement |  |  |  |  |  |  |  |  |  |  |  | 10,000 |
Annual Executive Payment |  |  |  |  |  |  |  |  | 10,000 |  |  |  |
Executive employment agreement charge | 0 | 0 | 0 | 0 | 0 | (1,873) | (3,889) | 0 | 0 | 5,762 | 0 |  |
Executive employment agreement liability, noncurrent | 9,731 |  |  |  |  |  |  |  | 9,731 |  |  |  |
Executive employment agreement liability, current | 10,000 |  |  |  |  |  |  |  | 10,000 |  |  |  |
Dr. Felix Zandman [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Executive Employment Agreements |  |  |  |  |  |  |  |  |  |  |  |  |
Executive employment agreement charge |  |  |  |  |  |  |  |  |  | 3,889 |  |  |
Dr. Lior Yahalomi [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Executive Employment Agreements |  |  |  |  |  |  |  |  |  |  |  |  |
Executive employment agreement charge |  |  |  |  |  |  |  |  |  | 1,873 |  |  |
General Semiconductor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental Matters |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued environmental liabilities | 14,964 |  |  |  |  |  |  |  | 14,964 |  |  |  |
Other Sites [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental Matters |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued environmental liabilities | 9,609 |  |  |  |  |  |  |  | 9,609 |  |  |  |
VPG [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |  |  |  |  |  |  |
Total rental expense under operating leases |  |  |  |  |  |  |  |  |  |  | $ 1,789 |  |

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