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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017
Statement of Comprehensive Income [Abstract] |  |  |  |
Net earnings | $ 34,680 | $ 47,322 | $ 75,160 | $ 87,283
Foreign currency translation adjustments: |  |  |  |
Unrealized translation gain (loss) | (46,953) | 21,551 | (40,149) | 40,941
Realized loss on divestiture of grinding media business recorded in earnings | 9,203 | 0 | 9,203 | 0
Gain (loss) on hedging activities: |  |  |  |
Net investment hedges | 2,396 | (550) | 1,607 | (1,076)
Realized loss on net investment hedge for grinding media business recorded in earnings | 1,215 | 0 | 1,215 | 0
Amortization cost included in interest expense | 25 | 18 | 44 | 37
Loss (deferred) on interest rate hedges | (2,467) | 0 | (2,467) | 0
Commodity hedges | 1,438 | 0 | 1,345 | 0
Other comprehensive income (loss) | (35,143) | 21,019 | (29,202) | 39,902
Comprehensive income | (463) | 68,341 | 45,958 | 127,185
Comprehensive loss (income) attributable to noncontrolling interests | (1,114) | (2,223) | (5,861) | (1,982)
Comprehensive income attributable to Valmont Industries, Inc. | $ (1,577) | $ 66,118 | $ 40,097 | $ 125,203

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