Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Current assets:
Allowance for Doubtful Accounts Receivable, Current	$ 478	$ 425
Shareholders’ equity:
Undesignated preferred stock, shares authorized (in shares)	5,000	5,000
Undesignated preferred stock, shares issued (in shares)	0	0
Undesignated preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	142,500	142,500
Common stock, shares issued (in shares)	53,743	54,901
Common stock, shares outstanding (in shares)	53,743	54,901