INCOME TAXES - Textuals (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Jan. 31, 2017	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Income Taxes [Line Items]
Corporate income tax rate	21.00%	35.00%		21.00%	33.80%	35.00%
Amount of additional SAB 118 tax expense			$ 6,900
Additional tax expense related to transition tax			3,300
Amount of income tax expense offset by income tax benefit related to revaluing deferred tax assets and liabilities			$ 4,400
Corporate income tax rate effective in 2018			21.00%
Deferred tax liabilities related to intangible assets				$ 21,742	$ 22,804
Valuation allowance of deferred tax assets				400
Undistributed earnings of foreign subsidiaries				78,000
Decrease in unrecognized tax position reserve for current year accrual of interest and penalties				100
Lapses of statutes of limitations				82	1,012	$ 0
GILTI Tax impact				200
SWITZERLAND
Income Taxes [Line Items]
Deferred tax liabilities related to intangible assets				$ 15,100	$ 15,800
SWITZERLAND | T.R.B. International S.A. [Member]
Income Taxes [Line Items]
Corporate income tax rate				11.60%