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Stockholders' Equity (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) $ / shares shares | Sep. 28, 2019 $ / shares | Jun. 29, 2019 $ / shares | Mar. 30, 2019 $ / shares | Dec. 31, 2018 $ / shares | Sep. 29, 2018 $ / shares | Jun. 30, 2018 $ / shares | Mar. 31, 2018 $ / shares | Dec. 31, 2019 USD ($) Vote shares $ / shares | Dec. 31, 2018 $ / shares | Dec. 31, 2017 $ / shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends per share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.3700 | $ 0.3225 | $ 0.2550
Shares reserved (in shares) |  | 41,248,720 |  |  |  |  |  |  |  | 41,248,720 |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restricted payments (annual limit) | $ |  | $ 100,000 |  |  |  |  |  |  |  | $ 100,000 |  |
Restricted payments (total limit) | $ |  | 300,000 |  |  |  |  |  |  |  | 300,000 |  |
Restricted payments (rollover limit) | $ |  | $ 25,000 |  |  |  |  |  |  |  | $ 25,000 |  |
Restricted payments pro forma ratio |  |  |  |  |  |  |  |  |  | 2.50 |  |
Class B Convertible Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Voting rights per share | Vote |  |  |  |  |  |  |  |  |  | 10 |  |
Conversion feature |  |  |  |  |  |  |  |  |  | one-for-one |  |
Shares reserved (in shares) |  | 12,097,409 |  |  |  |  |  |  |  | 12,097,409 |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Voting rights per share | Vote |  |  |  |  |  |  |  |  |  | 1 |  |
Restricted stock units outstanding [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved (in shares) |  | 842,000 |  |  |  |  |  |  |  | 842,000 |  |
Available to grant 2007 Stock Incentive Program - [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved (in shares) |  | 2,580,000 |  |  |  |  |  |  |  | 2,580,000 |  |
Phantom stock units outstanding [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved (in shares) |  | 183,000 |  |  |  |  |  |  |  | 183,000 |  |
Convertible Senior Debentures, Due 2040 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | [1] | 26,988 |  |  |  |  |  |  |  | 26,988 |  |
Number of shares debentures are convertible into (in shares) |  |  |  |  |  |  |  |  |  | 24,001 |  |
Convertible Senior Debentures, Due 2041 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | [1] | 1,108,803 |  |  |  |  |  |  |  | 1,108,803 |  |
Number of shares debentures are convertible into (in shares) |  |  |  |  |  |  |  |  |  | 986,058 |  |
Convertible Senior Notes, Due 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved (in shares) | [1] | 24,410,520 |  |  |  |  |  |  |  | 24,410,520 |  |
Number of shares debentures are convertible into (in shares) |  |  |  |  |  |  |  |  |  | 19,084,980 |  |
Dividend Paid [Member] |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends per share (in dollars per share) | $ / shares |  | $ 0.0950 | $ 0.0950 | $ 0.0950 | $ 0.0850 | $ 0.0850 | $ 0.0850 | $ 0.0850 | $ 0.0675 |  |  |
Record date |  | Dec. 12, 2019 | Sep. 12, 2019 | Jun. 13, 2019 | Mar. 14, 2019 | Dec. 06, 2018 | Sep. 14, 2018 | Jun. 13, 2018 | Mar. 14, 2018 |  |  |
Payment date |  | Dec. 23, 2019 | Sep. 26, 2019 | Jun. 27, 2019 | Mar. 28, 2019 | Dec. 20, 2018 | Sep. 27, 2018 | Jun. 28, 2018 | Mar. 29, 2018 |  |  |
[1] | At December 31, 2019, the convertible senior debentures due 2040 and due 2041 are convertible into 24,001 and 986,058 shares, respectively, of Vishay common stock. The convertible senior notes due 2025 are convertible into 19,084,980 shares of Vishay common stock. The Company has reserved adequate shares to ensure it could issue the maximum amount of shares to be delivered upon a make-whole fundamental change as defined in the indentures governing the convertible debt instruments.

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