Accrued Expenses (Details) (USD $)	Sep. 27, 2014	Dec. 28, 2013
Accrued Expenses
Compensation and related expenses	$ 50,414,000	$ 51,960,000
Forgivable loans to employees		4,966,000
Income taxes payable	740,000	3,503,000
Other	5,391,000	5,228,000
Total	56,545,000	65,657,000
Accrued bonuses	$ 37,600,000	$ 40,000,000