INTANGIBLES - Intangible assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Goodwill And Intangible Assets [Line Items]
Subtotal	$ 77,163	$ 76,155
Accumulated amortization	(34,759)	(29,750)
Total finite-lived intangible assets	42,404	46,405
Unamortized intangible assets
Goodwill	261,137	262,710	$ 269,262
Trademarks	439,742	442,265
Total indefinite-lived intangible assets	700,879	704,975
Total intangible assets, net	$ 743,283	751,380
Minimum
Unamortized intangible assets
Estimated Life	5 years
Maximum
Unamortized intangible assets
Estimated Life	17 years
License Agreements
Goodwill And Intangible Assets [Line Items]
Subtotal	$ 19,395	19,714
Unamortized intangible assets
Estimated Life	14 years
Trademarks
Goodwill And Intangible Assets [Line Items]
Subtotal	$ 2,194	2,194
Trademarks | Minimum
Unamortized intangible assets
Estimated Life	8 years
Trademarks | Maximum
Unamortized intangible assets
Estimated Life	12 years
Customer Relationships
Goodwill And Intangible Assets [Line Items]
Subtotal	$ 48,261	48,371
Customer Relationships | Minimum
Unamortized intangible assets
Estimated Life	15 years
Customer Relationships | Maximum
Unamortized intangible assets
Estimated Life	17 years
Other
Goodwill And Intangible Assets [Line Items]
Subtotal	$ 7,313	$ 5,876
Other | Minimum
Unamortized intangible assets
Estimated Life	5 years
Other | Maximum
Unamortized intangible assets
Estimated Life	10 years