Consolidated Statements of Stockholders' Equity Parenthetical - shares	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Statement of Stockholders' Equity [Abstract]
Common stock, shares purchased	(176,477)	(11,299)
Restricted stock, shares issued	131,867
Restricted stock, shares forfeited		(6,681)
Class B common stock converted into class A common stock, shares		2,635