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Segment and Geographic Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
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
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reporting segments | 5 |  |  |  |  |  |  |  | 5 |  |
Product sales |  |  |  |  |  |  |  |  | $ 2,587,396 | $ 2,719,311 | $ 2,036,323
Royalty revenues |  |  |  |  |  |  |  |  | 6,633 | 5,781 | 5,710
Total revenue | 551,391 | 637,649 | 709,838 | 695,151 | 688,612 | 694,365 | 701,655 | 640,460 | 2,594,029 | 2,725,092 | 2,042,033
Gross Margin | 125,656 | 167,477 | 212,190 | 214,663 | 211,501 | 218,378 | 210,593 | 167,013 | 719,986 | 807,485 | 388,161
Depreciation expense |  |  |  |  |  |  |  |  | 165,022 | 169,724 | 206,009
Interest expense (income) |  |  |  |  |  |  |  |  | 19,277 | 11,036 | 10,321
Capital expenditures |  |  |  |  |  |  |  |  | 168,641 | 145,413 | 50,340
Total Assets | 2,993,730 |  |  |  | 2,966,093 |  |  |  | 2,993,730 | 2,966,093 | 2,719,546
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  | 331,116 | 405,533 | (39,715)
Net earnings 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)
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)
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (37,874)
Asset write-downs |  |  |  |  |  |  |  |  | 0 | 0 | (681)
Executive employment agreement charge | 0 |  |  | 0 | 0 | 0 | 0 | 0 | (5,762) | 0 | (57,824)
Operating Income | 33,565 | 75,333 | 115,505 | 122,198 | 120,583 | 130,903 | 101,327 | 65,125 | 346,601 | 417,938 | (39,185)
Settlement agreement gain |  |  |  |  |  |  |  |  | 0 | 0 | 28,195
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues | 551,391 | 637,649 | 709,838 | 695,151 | 688,612 | 694,365 | 701,655 | 640,460 | 2,594,029 | 2,725,092 | 2,042,033
Property and equipment, net | 907,905 |  |  |  | 912,114 |  |  |  | 907,905 | 912,114 |
United States [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 363,847 | 345,267 | 312,262
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 363,847 | 345,267 | 312,262
Property and equipment, net | 136,159 |  |  |  | 141,309 |  |  |  | 136,159 | 141,309 |
Germany [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 801,539 | 726,235 | 544,364
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 801,539 | 726,235 | 544,364
Property and equipment, net | 125,905 |  |  |  | 128,549 |  |  |  | 125,905 | 128,549 |
Czech Republic [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 53,126 |  |  |  | 58,545 |  |  |  | 53,126 | 58,545 |
Other Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 175,639 | 217,099 | 195,212
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 175,639 | 217,099 | 195,212
Property and equipment, net | 97,212 |  |  |  | 96,313 |  |  |  | 97,212 | 96,313 |
Israel [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 219,037 | 292,025 | 212,483
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 219,037 | 292,025 | 212,483
Property and equipment, net | 125,885 |  |  |  | 121,070 |  |  |  | 125,885 | 121,070 |
Asia [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 1,033,967 | 1,144,466 | 777,712
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 1,033,967 | 1,144,466 | 777,712
People's Republic of China [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 178,877 |  |  |  | 181,043 |  |  |  | 178,877 | 181,043 |
Republic of China (Taiwan) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 117,450 |  |  |  | 117,513 |  |  |  | 117,450 | 117,513 |
Other Asia [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 71,677 |  |  |  | 66,093 |  |  |  | 71,677 | 66,093 |
Other Geographic Area [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 1,614 |  |  |  | 1,679 |  |  |  | 1,614 | 1,679 |
MOSFETS Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 537,783 | 626,498 | 427,110
Royalty revenues |  |  |  |  |  |  |  |  | 197 | 200 | 71
Total revenue |  |  |  |  |  |  |  |  | 537,980 | 626,698 | 427,181
Gross Margin |  |  |  |  |  |  |  |  | 125,498 | 189,209 | 57,280
Depreciation expense |  |  |  |  |  |  |  |  | 53,808 | 51,865 | 58,762
Interest expense (income) |  |  |  |  |  |  |  |  | 12 | 0 | 23
Capital expenditures |  |  |  |  |  |  |  |  | 61,520 | 55,457 | 10,309
Total Assets | 646,660 |  |  |  | 745,641 |  |  |  | 646,660 | 745,641 | 566,952
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (8,017)
Operating Income |  |  |  |  |  |  |  |  | 85,336 | 152,794 | 25,434
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 537,980 | 626,698 | 427,181
Diodes Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 607,493 | 596,354 | 410,415
Royalty revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenue |  |  |  |  |  |  |  |  | 607,493 | 596,354 | 410,415
Gross Margin |  |  |  |  |  |  |  |  | 143,876 | 138,308 | 51,361
Depreciation expense |  |  |  |  |  |  |  |  | 39,577 | 39,035 | 38,638
Interest expense (income) |  |  |  |  |  |  |  |  | 0 | 0 | 93
Capital expenditures |  |  |  |  |  |  |  |  | 39,444 | 30,879 | 12,474
Total Assets | 682,017 |  |  |  | 685,490 |  |  |  | 682,017 | 685,490 | 522,080
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (4,707)
Asset write-downs |  |  |  |  |  |  |  |  | 0 | 0 | (681)
Operating Income |  |  |  |  |  |  |  |  | 118,111 | 115,168 | 31,275
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 607,493 | 596,354 | 410,415
Optoelectronic Components Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 229,814 | 226,402 | 167,317
Royalty revenues |  |  |  |  |  |  |  |  | 72 | 96 | 13
Total revenue |  |  |  |  |  |  |  |  | 229,886 | 226,498 | 167,330
Gross Margin |  |  |  |  |  |  |  |  | 74,772 | 75,804 | 37,180
Depreciation expense |  |  |  |  |  |  |  |  | 12,384 | 12,282 | 14,757
Interest expense (income) |  |  |  |  |  |  |  |  | 0 | 0 | 172
Capital expenditures |  |  |  |  |  |  |  |  | 15,442 | 13,066 | 3,453
Total Assets | 163,486 |  |  |  | 163,584 |  |  |  | 163,486 | 163,584 | 132,065
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (2,755)
Operating Income |  |  |  |  |  |  |  |  | 60,492 | 64,088 | 24,441
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 229,886 | 226,498 | 167,330
Resistors And Inductors Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 634,490 | 622,819 | 438,600
Royalty revenues |  |  |  |  |  |  |  |  | 6,364 | 5,485 | 5,626
Total revenue |  |  |  |  |  |  |  |  | 640,854 | 628,304 | 444,226
Gross Margin |  |  |  |  |  |  |  |  | 213,997 | 222,785 | 109,093
Depreciation expense |  |  |  |  |  |  |  |  | 32,039 | 30,142 | 38,392
Interest expense (income) |  |  |  |  |  |  |  |  | 223 | 933 | (27)
Capital expenditures |  |  |  |  |  |  |  |  | 28,751 | 27,874 | 11,126
Total Assets | 609,556 |  |  |  | 602,466 |  |  |  | 609,556 | 602,466 | 572,076
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (9,374)
Operating Income |  |  |  |  |  |  |  |  | 185,327 | 195,730 | 85,406
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 640,854 | 628,304 | 444,226
Capacitors Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 577,816 | 546,149 | 420,890
Royalty revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenue |  |  |  |  |  |  |  |  | 577,816 | 546,149 | 420,890
Gross Margin |  |  |  |  |  |  |  |  | 161,843 | 144,349 | 80,533
Depreciation expense |  |  |  |  |  |  |  |  | 25,979 | 31,551 | 46,684
Interest expense (income) |  |  |  |  |  |  |  |  | 223 | 762 | 934
Capital expenditures |  |  |  |  |  |  |  |  | 19,676 | 17,132 | 10,567
Total Assets | 672,049 |  |  |  | 652,742 |  |  |  | 672,049 | 652,742 | 668,271
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (5,353)
Operating Income |  |  |  |  |  |  |  |  | 136,901 | 121,714 | 60,480
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 577,816 | 546,149 | 420,890
Vishay Precision Group Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 0 | 101,089 | 171,991
Royalty revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenue |  |  |  |  |  |  |  |  | 0 | 101,089 | 171,991
Gross Margin |  |  |  |  |  |  |  |  | 0 | 37,030 | 52,714
Depreciation expense |  |  |  |  |  |  |  |  | 0 | 3,391 | 8,446
Interest expense (income) |  |  |  |  |  |  |  |  | 0 | 33 | 69
Capital expenditures |  |  |  |  |  |  |  |  | 0 | 918 | 2,181
Total Assets | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 209,779
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  |  | 9,716 |
Net earnings attributable to Vishay stockholders |  |  |  |  |  |  |  |  |  | 5,811 |
Diluted earnings per share attributable to Vishay stockholders (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.03 |
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (2,048)
Operating Income |  |  |  |  |  |  |  |  | 0 | 18,949 | 22,510
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 0 | 101,089 | 171,991
Corporate Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Royalty revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenue |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gross Margin |  |  |  |  |  |  |  |  | 0 | 0 | 0
Depreciation expense |  |  |  |  |  |  |  |  | 1,235 | 1,458 | 330
Interest expense (income) |  |  |  |  |  |  |  |  | 18,819 | 9,308 | 9,057
Capital expenditures |  |  |  |  |  |  |  |  | 3,808 | 87 | 230
Total Assets | 219,962 |  |  |  | 116,170 |  |  |  | 219,962 | 116,170 | 48,323
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Unallocated Selling, General, and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance Costs |  |  |  |  |  |  |  |  | 0 | 0 | (5,620)
Operating Income |  |  |  |  |  |  |  |  | $ (233,804) | $ (250,505) | $ (220,547)

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