CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Accounts receivable, reserve for doubtful accounts	$ 16,350	$ 14,886
Property, plant and equipment, accumulated depreciation	202,863	197,629
Finite-Lived Intangible Assets, Accumulated Amortization	$ 350,795	$ 333,507
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000,000	2,000,000,000
Preferred stock, shares issued	0	0
Common stock, shares authorized	95,000,000,000	95,000,000,000
Common stock, shares issued	63,206,417	63,129,775
Treasury stock, shares	7,896,428	6,940,089