Retirement Benefit Plans Defined Contribution Plan (Details) (Defined Contribution Pension [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Defined Contribution Pension [Member]
Schedule of Defined Contribution Plans [Line Items]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	75.00%
Defined Contribution Plan, Employer Matching Contribution, Percent	4.00%
Defined Contribution Plan, Cost Recognized	$ 8,235	$ 8,887	$ 7,944