Inventories (Tables)

6 Months Ended

Jul. 31, 2017

Inventory Disclosure [Abstract]

Schedule of inventories

	July 31, 2017		July 31, 2016		January 31, 2017
	(In thousands)
Finished goods	$	654,516	$	567,864	$	483,085
Raw materials and work-in-process		756		2,132		184
	$	655,272	$	569,996	$	483,269