Consolidated Statements of Stockholders' Equity Parenthetical - shares	3 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Jun. 29, 2019	Mar. 30, 2019
Statement of Stockholders' Equity [Abstract]
Common stock, shares issued under Directors' Stock Plan			29,001
Common stock, shares purchased	(3,460)	(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