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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
$ in Thousands
Apr. 01, 2018
Dec. 31, 2017
Allowance for doubtful accounts $ 4,447  
Preferred stock, par value (in dollars per share) $ 0.131 $ 0.131
Preferred stock, shares authorized 20,000,000 20,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 41,334,000  
Common stock, shares outstanding 41,334,000