Retirement Benefit Plans Executive Plan (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012 Chief Executive Officer [Member]	Dec. 30, 2012 Supplemental Employee Retirement Plans, Defined Benefit [Member]	Jan. 01, 2012 Supplemental Employee Retirement Plans, Defined Benefit [Member]	Dec. 30, 2012 Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension and Other Postretirement Defined Benefit Plans, Liabilities		$ 4,315	$ 4,450
Deferred Compensation Arrangement with Individual, Base Salary	1,000
Deferred Compensation Arrangement with Individual, Recorded Liability				$ 102