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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2019
Sep. 27, 2018
Sep. 26, 2019
Sep. 27, 2018
Consolidated Statements of Comprehensive Income        
Amortization of the net actuarial loss and prior service credit related to the pension, net of tax effect $ 30 $ 42 $ 89 $ 125
Fair market value adjustment of interest rate swap, net of tax benefit (35) 70 (340) 70
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax $ 11 $ 17 $ 19 $ 49