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GUARANTOR/NON-GUARANTOR FINANCIAL INFORMATION (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 30, 2019 | Mar. 31, 2018 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |
Net earnings |  |  | $ 100,306 | $ 122,319 | $ 178,391
Foreign currency translation adjustments: |  |  |  |  |
Unrealized translation gains (losses) |  |  | (65,436) | 79,279 | (58,315)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax |  |  | 9,203 |  | 0
Gain (Loss) on Hedging Activity |  |  | 4,814 | (1,621) | 4,300
Unrealized gain/(loss) on cash flow hedge: |  |  |  |  |
Unrealized gain (loss) on net investment hedge | $ 5,291 | $ (1,695) |  |  | 4,226
Amortization cost included in interest expense |  |  | 423 | 74 | 74
Realized loss on grinding media net investment hedge | 1,215 | 0 |  |  | 0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax | $ 1,021 | $ 0 |  |  | 0
Derivative adjustment |  |  | 4,814 | (1,621) | 4,300
Actuarial gain (loss) in defined benefit pension plan |  |  | 29,885 | (10,871) | (24,141)
Equity in other comprehensive income |  |  | 0 | 0 | 0
Other comprehensive income (loss) |  |  | (21,534) | 66,787 | (78,156)
Comprehensive income (loss) |  |  | 78,772 | 189,106 | 100,235
Comprehensive income attributable to noncontrolling interests |  |  | (8,584) | (5,529) | (6,144)
Comprehensive income (loss) attributable to Valmont Industries, Inc. |  |  | 70,188 | 183,577 | 94,091
Eliminations |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |
Net earnings |  |  | (104,164) | (105,852) | (208,027)
Foreign currency translation adjustments: |  |  |  |  |
Unrealized translation gains (losses) |  |  | 0 | 0 | 0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax |  |  | 0 |  |
Gain (Loss) on Hedging Activity |  |  | 0 | 0 | 0
Unrealized gain/(loss) on cash flow hedge: |  |  |  |  |
Actuarial gain (loss) in defined benefit pension plan |  |  | 0 | 0 | 0
Equity in other comprehensive income |  |  | 28,977 | (68,958) | 83,252
Other comprehensive income (loss) |  |  | 28,977 | (68,958) | 83,252
Comprehensive income (loss) |  |  | (75,187) | (174,810) | (124,775)
Comprehensive income attributable to noncontrolling interests |  |  | 0 | 0 | 0
Comprehensive income (loss) attributable to Valmont Industries, Inc. |  |  | (75,187) | (174,810) | (124,775)
Parent |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |
Net earnings |  |  | 94,351 | 116,240 | 173,232
Foreign currency translation adjustments: |  |  |  |  |
Unrealized translation gains (losses) |  |  | 0 | 0 | 0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax |  |  | 0 |  |
Gain (Loss) on Hedging Activity |  |  | 4,814 | (1,621) | 4,300
Unrealized gain/(loss) on cash flow hedge: |  |  |  |  |
Actuarial gain (loss) in defined benefit pension plan |  |  | 0 | 0 | 0
Equity in other comprehensive income |  |  | (28,977) | 68,958 | (83,252)
Other comprehensive income (loss) |  |  | (24,163) | 67,337 | (78,952)
Comprehensive income (loss) |  |  | 70,188 | 183,577 | 94,280
Comprehensive income attributable to noncontrolling interests |  |  | 0 | 0 | 0
Comprehensive income (loss) attributable to Valmont Industries, Inc. |  |  | 70,188 | 183,577 | 94,280
Guarantors |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |
Net earnings |  |  | 77,679 | 52,562 | 104,625
Foreign currency translation adjustments: |  |  |  |  |
Unrealized translation gains (losses) |  |  | (6,509) | 138,795 | 49
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax |  |  | 0 |  |
Gain (Loss) on Hedging Activity |  |  | 0 | 0 | 0
Unrealized gain/(loss) on cash flow hedge: |  |  |  |  |
Actuarial gain (loss) in defined benefit pension plan |  |  | 0 | 0 | 0
Equity in other comprehensive income |  |  | 0 | 0 | 0
Other comprehensive income (loss) |  |  | (6,509) | 138,795 | 49
Comprehensive income (loss) |  |  | 71,170 | 191,357 | 104,674
Comprehensive income attributable to noncontrolling interests |  |  | 0 | 0 | 0
Comprehensive income (loss) attributable to Valmont Industries, Inc. |  |  | 71,170 | 191,357 | 104,674
Non- Guarantors |  |  |  |  |
Condensed consolidated financial information for the Company (Parent), the guarantor subsidiaries and the non-guarantor subsidiaries |  |  |  |  |
Net earnings |  |  | 32,440 | 59,369 | 108,561
Foreign currency translation adjustments: |  |  |  |  |
Unrealized translation gains (losses) |  |  | (58,927) | (59,516) | (58,364)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax |  |  | 9,203 |  |
Gain (Loss) on Hedging Activity |  |  | 0 | 0 | 0
Unrealized gain/(loss) on cash flow hedge: |  |  |  |  |
Actuarial gain (loss) in defined benefit pension plan |  |  | 29,885 | (10,871) | (24,141)
Equity in other comprehensive income |  |  | 0 | 0 | 0
Other comprehensive income (loss) |  |  | (19,839) | (70,387) | (82,505)
Comprehensive income (loss) |  |  | 12,601 | (11,018) | 26,056
Comprehensive income attributable to noncontrolling interests |  |  | (8,584) | (5,529) | (6,144)
Comprehensive income (loss) attributable to Valmont Industries, Inc. |  |  | $ 4,017 | $ (16,547) | $ 19,912

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