CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, authorized (in shares)	40	40
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized (in shares)	200,000	200,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.008	$ 0.008
Common stock, issued (in shares)	81,695	80,401
Common stock, outstanding (in shares)	69,504	71,265
Treasury stock, at cost (in shares)	12,191	9,136