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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
May 25, 2019
May 26, 2018
Consolidated Balance Sheets [Abstract]    
Trade accounts receivable, allowance for doubtful accounts $ 2,520 $ 1,640
Preferred stock, par value $ 0.01 $ 0.01
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 $ 0.01 $ 0.01
Common stock, shares authorized 70,000,000 70,000,000
Common stock, shares issued 63,054,000 61,252,000
Common stock, shares outstanding 31,588,000 31,614,000
Treasury stock at cost, shares 31,466,000 29,638,000