CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Apr. 04, 2020	Dec. 28, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 15,283	$ 13,234
Property, plant and equipment, accumulated depreciation	$ 456,174	$ 464,913
Common stock, shares issued (in shares)	50,583,045	50,516,477
Common stock, shares outstanding (in shares)	50,583,045	50,516,477