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GUARANTOR/NON-GUARANTOR FINANCIAL INFORMATION (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 28, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Dec. 29, 2012 | Sep. 29, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 827,890 | $ 778,032 | $ 878,659 | $ 819,630 | $ 815,037 | $ 729,839 | $ 767,315 | $ 717,350 | $ 3,304,211 | $ 3,029,541 | $ 2,661,480
Cost of sales |  |  |  |  |  |  |  |  | 2,358,983 | 2,227,085 | 1,994,670
Gross profit | 222,824 | 225,564 | 261,471 | 235,369 | 224,345 | 192,402 | 199,395 | 186,314 | 945,228 | 802,456 | 666,810
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 472,159 | 420,160 | 403,500
Operating income |  |  |  |  |  |  |  |  | 473,069 | 382,296 | 263,310
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (32,502) | (31,625) | (36,175)
Interest income |  |  |  |  |  |  |  |  | 6,477 | 8,272 | 9,265
Other |  |  |  |  |  |  |  |  | 2,373 | 347 | (2,643)
Total other income (expenses) |  |  |  |  |  |  |  |  | (23,652) | (23,006) | (29,553)
Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 449,417 | 359,290 | 233,757
Income tax expense (benefit): |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | 167,922 | 122,782 | 89,552
Deferred |  |  |  |  |  |  |  |  | (10,141) | 3,720 | (84,962)
Total income tax expense (benefit) |  |  |  |  |  |  |  |  | 157,781 | 126,502 | 4,590
Earnings before equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 291,636 | 232,788 | 229,167
Equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 835 | 6,128 | 8,059
Loss from deconsolidation of subsidiary |  |  |  |  |  |  |  |  | (12,011) |  |
Net earnings |  |  |  |  |  |  |  |  | 280,460 | 238,916 | 237,226
Less: Earnings attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (1,971) | (4,844) | (8,918)
Net earnings attributable to Valmont Industries, Inc. | 54,868 | 56,489 | 89,563 | 77,569 | 65,036 | 56,731 | 59,980 | 52,325 | 278,489 | 234,072 | 228,308
Parent |  |  |  |  |  |  |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,540,266 | 1,375,238 | 1,164,400
Cost of sales |  |  |  |  |  |  |  |  | 1,107,020 | 1,008,087 | 863,269
Gross profit |  |  |  |  |  |  |  |  | 433,246 | 367,151 | 301,131
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 209,350 | 178,669 | 166,964
Operating income |  |  |  |  |  |  |  |  | 223,896 | 188,482 | 134,167
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (30,801) | (31,121) | (35,456)
Interest income |  |  |  |  |  |  |  |  | 55 | 45 | 59
Other |  |  |  |  |  |  |  |  | 4,791 | 1,938 | (311)
Total other income (expenses) |  |  |  |  |  |  |  |  | (25,955) | (29,138) | (35,708)
Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 197,941 | 159,344 | 98,459
Income tax expense (benefit): |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | 78,912 | 59,648 | 48,243
Deferred |  |  |  |  |  |  |  |  | (8,948) | (4,721) | (4,787)
Total income tax expense (benefit) |  |  |  |  |  |  |  |  | 69,964 | 54,927 | 43,456
Earnings before equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 127,977 | 104,417 | 55,003
Equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 150,512 | 129,655 | 173,305
Net earnings |  |  |  |  |  |  |  |  | 278,489 | 234,072 | 228,308
Net earnings attributable to Valmont Industries, Inc. |  |  |  |  |  |  |  |  | 278,489 | 234,072 | 228,308
Guarantors |  |  |  |  |  |  |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 689,230 | 620,338 | 401,443
Cost of sales |  |  |  |  |  |  |  |  | 503,431 | 489,560 | 323,812
Gross profit |  |  |  |  |  |  |  |  | 185,799 | 130,778 | 77,631
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 59,370 | 55,488 | 50,783
Operating income |  |  |  |  |  |  |  |  | 126,429 | 75,290 | 26,848
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (46,999) | (49,762) |
Interest income |  |  |  |  |  |  |  |  | 1,032 | 1,131 | 331
Other |  |  |  |  |  |  |  |  | 9 | 55 | 59
Total other income (expenses) |  |  |  |  |  |  |  |  | (45,958) | (48,576) | 390
Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 80,471 | 26,714 | 27,238
Income tax expense (benefit): |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | 35,772 | 16,398 | 10,571
Deferred |  |  |  |  |  |  |  |  | (19) | (496) | (964)
Total income tax expense (benefit) |  |  |  |  |  |  |  |  | 35,753 | 15,902 | 9,607
Earnings before equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 44,718 | 10,812 | 17,631
Equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 53,236 | 86,170 | 125,269
Net earnings |  |  |  |  |  |  |  |  | 97,954 | 96,982 | 142,900
Net earnings attributable to Valmont Industries, Inc. |  |  |  |  |  |  |  |  | 97,954 | 96,982 | 142,900
Non-Guarantors |  |  |  |  |  |  |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,402,191 | 1,331,827 | 1,305,424
Cost of sales |  |  |  |  |  |  |  |  | 1,078,695 | 1,026,037 | 1,016,305
Gross profit |  |  |  |  |  |  |  |  | 323,496 | 305,790 | 289,119
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 203,439 | 186,003 | 185,753
Operating income |  |  |  |  |  |  |  |  | 120,057 | 119,787 | 103,366
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (1,699) | (504) | (719)
Interest income |  |  |  |  |  |  |  |  | 52,387 | 56,858 | 8,875
Other |  |  |  |  |  |  |  |  | (2,427) | (1,646) | (2,391)
Total other income (expenses) |  |  |  |  |  |  |  |  | 48,261 | 54,708 | 5,765
Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 168,318 | 174,495 | 109,131
Income tax expense (benefit): |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | 52,558 | 47,375 | 30,738
Deferred |  |  |  |  |  |  |  |  | (1,174) | 8,937 | (79,211)
Total income tax expense (benefit) |  |  |  |  |  |  |  |  | 51,384 | 56,312 | (48,473)
Earnings before equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 116,934 | 118,183 | 157,604
Equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 494 | 5,150 | 6,818
Loss from deconsolidation of subsidiary |  |  |  |  |  |  |  |  | (12,011) |  |
Net earnings |  |  |  |  |  |  |  |  | 105,417 | 123,333 | 164,422
Less: Earnings attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (1,971) | (4,844) | (8,918)
Net earnings attributable to Valmont Industries, Inc. |  |  |  |  |  |  |  |  | 103,446 | 118,489 | 155,504
Eliminations |  |  |  |  |  |  |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (327,476) | (297,862) | (209,787)
Cost of sales |  |  |  |  |  |  |  |  | (330,163) | (296,599) | (208,716)
Gross profit |  |  |  |  |  |  |  |  | 2,687 | (1,263) | (1,071)
Operating income |  |  |  |  |  |  |  |  | 2,687 | (1,263) | (1,071)
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | 46,997 | 49,762 |
Interest income |  |  |  |  |  |  |  |  | (46,997) | (49,762) |
Earnings before income taxes and equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 2,687 | (1,263) | (1,071)
Income tax expense (benefit): |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | 680 | (639) |
Total income tax expense (benefit) |  |  |  |  |  |  |  |  | 680 | (639) |
Earnings before equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | 2,007 | (624) | (1,071)
Equity in earnings of nonconsolidated subsidiaries |  |  |  |  |  |  |  |  | (203,407) | (214,847) | (297,333)
Net earnings |  |  |  |  |  |  |  |  | (201,400) | (215,471) | (298,404)
Net earnings attributable to Valmont Industries, Inc. |  |  |  |  |  |  |  |  | $ (201,400) | $ (215,471) | $ (298,404)

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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 + Details
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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686 + Details
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- Definition Sum of operating profit and nonoperating income (expense) after income taxes and before income (loss) from equity method investments and noncontrolling interest. + References No definition available. + Details
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