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Segment and Geographic Data (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Dec. 31, 2012 | Sep. 29, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 Segment | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reporting segments |  |  |  |  |  |  |  |  | 5 |  |
Segment Reporting Information, Description of Products and Services |  |  |  |  |  |  |  |  | The Company evaluates business segment performance on operating income, exclusive of certain items ("segment operating income"). Only dedicated, direct selling, general, and administrative expenses of the segments are included in the calculation of segment operating income. The Company's calculation of segment operating income excludes such selling, general, and administrative costs as global operations, sales and marketing, information systems, finance and administration groups, as well as restructuring and severance costs, executive compensation charges (credits), material gains or losses on sales of property, and other items. Management believes that evaluating segment performance excluding such items is meaningful because it provides insight with respect to intrinsic operating results of the Company. These items represent reconciling items between segment operating income and consolidated operating income. Business segment assets are the owned or allocated assets used by each business. |  |
Product sales |  |  |  |  |  |  |  |  | $ 2,364,617 | $ 2,222,966 | $ 2,587,396
Royalty revenues |  |  |  |  |  |  |  |  | 6,362 | 7,131 | 6,633
Total revenue | 616,170 | 602,890 | 597,665 | 554,254 | 530,570 | 572,781 | 588,199 | 538,547 | 2,370,979 | 2,230,097 | 2,594,029
Gross Margin | 144,449 | 143,220 | 142,857 | 136,734 | 108,791 | 133,554 | 147,619 | 136,709 | 567,260 | 526,673 | 719,986
Depreciation expense |  |  |  |  |  |  |  |  | 155,064 | 153,801 | 165,022
Interest expense (income) |  |  |  |  |  |  |  |  | 23,130 | 22,604 | 19,277
Capital expenditures |  |  |  |  |  |  |  |  | 153,077 | 150,291 | 168,641
Total Assets | 3,237,139 |  |  |  | 3,016,277 |  |  |  | 3,237,139 | 3,016,277 | 2,993,730
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Restructuring and severance costs |  |  |  |  |  |  |  |  | (2,814) | 0 | 0
Gain on Sale of Property | 0 | 0 | 0 | 0 | 0 | 0 | 12,153 | 0 | 0 | 12,153 | 0
Executive Compensation Credit (Charges) | 0 | 0 | (1,778) | 0 | 0 | 0 | 0 | 0 | 1,778 | 0 | (5,762)
Operating Income |  |  |  |  |  |  |  |  | 197,682 | 189,201 | 346,601
MOSFETS Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 449,299 | 433,436 | 537,783
Royalty revenues |  |  |  |  |  |  |  |  | 178 | 246 | 197
Total revenue |  |  |  |  |  |  |  |  | 449,477 | 433,682 | 537,980
Gross Margin |  |  |  |  |  |  |  |  | 59,387 | 56,694 | 125,498
Depreciation expense |  |  |  |  |  |  |  |  | 50,606 | 49,124 | 53,808
Interest expense (income) |  |  |  |  |  |  |  |  | 0 | 0 | 12
Capital expenditures |  |  |  |  |  |  |  |  | 41,869 | 49,201 | 61,520
Total Assets | 543,037 |  |  |  | 625,597 |  |  |  | 543,037 | 625,597 | 646,660
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | 19,140 | 17,198 | 85,336
Diodes Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 547,264 | 496,744 | 607,493
Royalty revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenue |  |  |  |  |  |  |  |  | 547,264 | 496,744 | 607,493
Gross Margin |  |  |  |  |  |  |  |  | 121,231 | 99,116 | 143,876
Depreciation expense |  |  |  |  |  |  |  |  | 37,305 | 36,335 | 39,577
Interest expense (income) |  |  |  |  |  |  |  |  | 54 | 64 | 0
Capital expenditures |  |  |  |  |  |  |  |  | 44,431 | 30,025 | 39,444
Total Assets | 788,121 |  |  |  | 670,811 |  |  |  | 788,121 | 670,811 | 682,017
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | 96,581 | 75,733 | 118,111
Optoelectronic Components Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 228,194 | 209,141 | 229,814
Royalty revenues |  |  |  |  |  |  |  |  | 51 | 53 | 72
Total revenue |  |  |  |  |  |  |  |  | 228,245 | 209,194 | 229,886
Gross Margin |  |  |  |  |  |  |  |  | 76,732 | 67,943 | 74,772
Depreciation expense |  |  |  |  |  |  |  |  | 12,484 | 11,917 | 12,384
Interest expense (income) |  |  |  |  |  |  |  |  | 122 | 140 | 0
Capital expenditures |  |  |  |  |  |  |  |  | 18,310 | 16,759 | 15,442
Total Assets | 213,128 |  |  |  | 199,385 |  |  |  | 213,128 | 199,385 | 163,486
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | 62,259 | 54,632 | 60,492
Resistors And Inductors Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 700,115 | 635,488 | 634,490
Royalty revenues |  |  |  |  |  |  |  |  | 6,133 | 6,832 | 6,364
Total revenue |  |  |  |  |  |  |  |  | 706,248 | 642,320 | 640,854
Gross Margin |  |  |  |  |  |  |  |  | 221,851 | 204,137 | 213,997
Depreciation expense |  |  |  |  |  |  |  |  | 31,998 | 31,921 | 32,039
Interest expense (income) |  |  |  |  |  |  |  |  | 79 | 543 | 223
Capital expenditures |  |  |  |  |  |  |  |  | 32,515 | 35,878 | 28,751
Total Assets | 843,685 |  |  |  | 760,257 |  |  |  | 843,685 | 760,257 | 609,556
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | 186,583 | 172,129 | 185,327
Capacitors Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  | 439,745 | 448,157 | 577,816
Royalty revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenue |  |  |  |  |  |  |  |  | 439,745 | 448,157 | 577,816
Gross Margin |  |  |  |  |  |  |  |  | 88,059 | 98,783 | 161,843
Depreciation expense |  |  |  |  |  |  |  |  | 21,596 | 23,354 | 25,979
Interest expense (income) |  |  |  |  |  |  |  |  | 28 | 52 | 223
Capital expenditures |  |  |  |  |  |  |  |  | 13,052 | 15,531 | 19,676
Total Assets | 636,637 |  |  |  | 587,586 |  |  |  | 636,637 | 587,586 | 672,049
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | 64,494 | 76,858 | 136,901
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 |  |  |  |  |  |  |  |  | 1,075 | 1,150 | 1,235
Interest expense (income) |  |  |  |  |  |  |  |  | 22,847 | 21,805 | 18,819
Capital expenditures |  |  |  |  |  |  |  |  | 2,900 | 2,897 | 3,808
Total Assets | 212,531 |  |  |  | 172,641 |  |  |  | 212,531 | 172,641 | 219,962
Unallocated Selling, General, and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | $ (230,339) | $ (219,502) | $ (233,804)

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