Retirement Plans (Retirement Plan Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	$ 5,794	$ 4,804	$ 2,960
Retirement savings plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	1,715	1,560	1,242
Profit-sharing plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	1,750	1,650	1,650
Deferred compensation plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	126	291	(26)
Supplemental retirement plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	2,025	1,105	111
Pharmacist deferred compensation plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	$ 178	$ 198	$ (17)