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Consolidated Balance Sheet (Parenthetical) - USD ($)
$ in Thousands
Nov. 30, 2018
May 31, 2018
Accounts receivable, allowance $ 1,700 $ 1,550
Preferred stock, par value $ 1.00 $ 1.00
Preferred stock, shares authorized 100,000 100,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.16 $ 0.16
Common stock, shares authorized 60,000,000 60,000,000
Common stock, shares issued 52,081,876 51,735,732
Common stock, shares outstanding 52,081,876 51,735,732
Customer-based intangibles    
Accumulated Amortization $ 26,292 $ 24,579
Other Intangible Assets    
Accumulated Amortization $ 11,440 $ 12,470