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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Numerator [Abstract] |  |  |
Net earnings (loss) attributable to Vishay stockholders | $ 122,923 | $ 163,936 | $ 345,758
Denominator for basic earnings (loss) per share [Abstract] |  |  |
Weighted average shares (in shares) | 144,641 | 144,427 | 144,202
Outstanding phantom stock units (in shares) | 195 | 181 | 168
Adjusted weighted average shares - basic (in shares) | 144,836 | 144,608 | 144,370
Effect of dilutive securities [Abstract] |  |  |
Convertible debt instruments (in shares) | 30 | 100 | 9,707
Restricted stock units (in shares) | 362 | 428 | 545
Dilutive potential common shares (in shares) | 392 | 528 | 10,252
Denominator for diluted earnings (loss) per share [Abstract] |  |  |
Adjusted weighted average shares - diluted (in shares) | 145,228 | 145,136 | 154,622
Basic earnings (loss) per share attributable to Vishay stockholders (in dollars per share) | $ 0.85 | $ 1.13 | $ 2.39
Diluted earnings (loss) per share attributable to Vishay stockholders (in dollars per share) | 0.85 | $ 1.13 | $ 2.24
Convertible Senior Debentures, Due 2040 [Member] |  |  |
Antidilutive Securities [Abstract] |  |  |
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) | $ 12.22 |  |
Convertible Senior Debentures, Due 2041 [Member] |  |  |
Antidilutive Securities [Abstract] |  |  |
Antidilutive securities (in shares) | 100 | 301 | 0
Convertible Senior Notes, Due 2025 [Member] |  |  |
Antidilutive Securities [Abstract] |  |  |
Antidilutive securities (in shares) | 17,062 | 19,063 | 10,468
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) | $ 31.36 |  |
Weighted average other [Member] |  |  |
Antidilutive Securities [Abstract] |  |  |
Antidilutive securities (in shares) | 341 | 315 | 266

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