Basis of Presentation (Tables)

3 Months Ended

Aug. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventory

Inventory is comprised of the following amounts at: 

(In thousands)	August 31, 2017		May 31, 2017
Raw materials	$	16,801	$	17,528
Work in process	20,261		17,951
Finished goods	246,135		242,739
	$	283,197	$	278,218