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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2016
Jan. 02, 2016
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 2,116 $ 1,698
Preferred stock, par value (in usd per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in usd per share) $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares outstanding 51,636,000 50,188,000
Treasury stock, shares 15,059,000 14,255,000