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Condensed Consolidated Statement of Comprehensive (Loss) Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Other Comprehensive Items:        
Pension and other post-retirement liability adjustments, tax effect $ 75 $ 11 $ 109 $ 60
Deferred (loss) gain on cash flow hedges, tax effect $ (55) $ 1 $ (47) $ 16