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CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
Mar. 30, 2019
Dec. 29, 2018
Statement of Financial Position [Abstract]    
Accounts receivable - allowances $ 12,989 $ 14,001
Property, plant and equipment, accumulated depreciation $ 455,357 $ 453,319
Common stock, shares issued (in shares) 49,772 49,518
Common stock, shares outstanding (in shares) 49,772 49,518