Employee and Director Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Contributions to plan
Contributions to defined contribution plans	$ 25,731	$ 26,010	$ 24,185
Net recognized gains (losses) of securities
Gains (losses) on securities held in NQDC trust	(1,471)	6,145	1,741
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Unfunded projected benefit obligation - defined benefit retirement plans	$ 7,990	$ 6,976	$ 6,164