CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 26, 2020	Dec. 28, 2019
Statement of Financial Position [Abstract]
Trade receivables, allowance for doubtful accounts	$ 6,702	$ 3,664
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	49,767,000	48,936,000
Common Stock, shares outstanding (in shares)	49,767,000	48,936,000
Treasury stock, shares (in shares)	0	0