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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Sep. 28, 2018
Sep. 29, 2017
Sep. 30, 2016
Statement of Comprehensive Income [Abstract]      
Unrecognized gain (loss) arising during period, tax $ (460) $ (938) $ 1,168
Change in periodic benefit plan, tax $ (133) $ (278) $ (215)