CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 27, 2014	Dec. 28, 2013
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 0	$ 202,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	3,000	3,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	120,000,000	120,000,000
Common stock, issued	78,110,113	77,567,631
Common stock, outstanding	62,648,707	62,560,946
Treasury stock, shares	12,102,258	12,032,537