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Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2011 | Oct. 01, 2011 | Jul. 02, 2011 | Apr. 02, 2011 | Dec. 31, 2010 | Oct. 02, 2010 | Jul. 04, 2010 | Apr. 03, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2011 Convertible Senior Debentures, Due 2040 [Member] | Dec. 31, 2010 Convertible Senior Debentures, Due 2040 [Member] | Dec. 31, 2009 Convertible Senior Debentures, Due 2040 [Member] | Dec. 31, 2011 Convertible Senior Debentures, Due 2041 [Member] | Dec. 31, 2010 Convertible Senior Debentures, Due 2041 [Member] | Dec. 31, 2009 Convertible Senior Debentures, Due 2041 [Member] | Dec. 31, 2011 Convertible Subordinated Notes, Due 2023 [Member] | Dec. 31, 2010 Convertible Subordinated Notes, Due 2023 [Member] | Dec. 31, 2009 Convertible Subordinated Notes, Due 2023 [Member] | Dec. 31, 2008 Convertible Subordinated Notes, Due 2023 [Member] | Dec. 31, 2011 Exchangeable Unsecured Notes, Due 2102 [Member] | Dec. 31, 2010 Exchangeable Unsecured Notes, Due 2102 [Member] | Dec. 31, 2009 Exchangeable Unsecured Notes, Due 2102 [Member] | Dec. 31, 2011 Weighted average stock options [Member] | Dec. 31, 2010 Weighted average stock options [Member] | Dec. 31, 2009 Weighted average stock options [Member] | Dec. 31, 2011 Weighted average warrants [Member] | Dec. 31, 2010 Weighted average warrants [Member] | Dec. 31, 2009 Weighted average warrants [Member] | Dec. 31, 2011 Weighted average other [Member] | Dec. 31, 2010 Weighted average other [Member] | Dec. 31, 2009 Weighted average other [Member]
Numerator for basic earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) attributable to Vishay stockholders | $ 30,952 | $ 50,487 | $ 82,095 | $ 75,287 | $ 147,228 | $ 89,799 | $ 76,659 | $ 45,420 | $ 238,821 | $ 359,106 | $ (57,188) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to the numerator for continuing operations and net earnings (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest savings assuming conversion of dilutive convertible and exchangeable notes, net of tax |  |  |  |  |  |  |  |  | 189 | 257 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator for diluted earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) |  |  |  |  |  |  |  |  | 239,010 | 359,363 | (57,188) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding - basic (in shares) |  |  |  |  |  |  |  |  | 160,094 | 183,618 | 186,605 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible and exchangeable debt instruments (in shares) |  |  |  |  |  |  |  |  | 7,820 | 6,313 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee stock options (in shares) |  |  |  |  |  |  |  |  | 106 | 10 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other (in shares) |  |  |  |  |  |  |  |  | 494 | 286 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dilutive potential common shares (in shares) |  |  |  |  |  |  |  |  | 8,420 | 6,609 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted weighted average shares (in shares) |  |  |  |  |  |  |  |  | 168,514 | 190,227 | 186,605 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share attributable to Vishay stockholders (in dollars per share) | $ 0.20 | $ 0.32 | $ 0.51 | $ 0.46 | $ 0.84 | $ 0.48 | $ 0.41 | $ 0.24 | $ 1.49 | $ 1.96 | $ (0.31) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted earnings per share attributable to Vishay stockholders (in dollars per share) | $ 0.19 | $ 0.31 | $ 0.48 | $ 0.43 | $ 0.81 | $ 0.47 | $ 0.40 | $ 0.24 | $ 1.42 | $ 1.89 | $ (0.31) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount (in shares) |  |  |  |  |  |  |  |  |  |  |  | 9,905 | 0 | 0 | 5,026 | 0 | 0 | 0 | 51 | 87 |  | 0 | 0 | 6,176 | 182 | 2,243 | 3,615 | 8,824 | 8,824 | 8,824 | 123 | 35 | 294
Minimum market price of common stock for inclusion of shares issuable upon conversion of senior debentures for calculation of diluted earnings per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 13.88 |  |  | $ 19.02 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding convertible subordinated notes repurchased (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99.60% |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of convertible subordinated notes redeemed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,870 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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