CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 29, 2014	Dec. 29, 2013
Trade receivables, allowance	$ 4,836	$ 6,040
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Treasury stock, shares	658,185	11,207
Common Class A
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	62,815,324	61,544,524
Common Class B
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	24,585,962	24,800,962