Consolidated Statements of Stockholders' Equity Parenthetical - shares	3 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Exercised	0	0	0	0
Common stock, shares issued under Directors' Stock Plan	29,001	0	39,711	0
Common stock, shares purchased	0	(11,299)	(500)	(19,726)
Restricted stock, shares issued	0	0	0	297,292
Restricted stock, shares forfeited	0	(6,681)	(6,196)	0
Class B common stock converted into class A common stock, shares	0	2,635	0	6,250