DERIVATIVE FINANCIAL INSTRUMENTS - ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Fair Values of Derivative Financial Instruments
Assets, Fair Value	$ 1,270	$ 812
Liabilities, Fair Value	21,169	13,633
Prepaid Expenses and Other Current Assets | Foreign Exchange Contract | Derivative designated as hedging instruments
Fair Values of Derivative Financial Instruments
Assets, Fair Value	544	710
Prepaid Expenses and Other Current Assets | Foreign Exchange Contract | Derivative not designated as hedging instruments
Fair Values of Derivative Financial Instruments
Assets, Fair Value	726	102
Accrued expenses and other current liabilities | Foreign Exchange Contract | Derivative designated as hedging instruments
Fair Values of Derivative Financial Instruments
Liabilities, Fair Value	724	16
Accrued expenses and other current liabilities | Foreign Exchange Contract | Derivative not designated as hedging instruments
Fair Values of Derivative Financial Instruments
Liabilities, Fair Value	0	116
Accrued expenses and other current liabilities | Interest rate swap | Derivative designated as hedging instruments
Fair Values of Derivative Financial Instruments
Liabilities, Fair Value	3,897	2,060
Other liabilities | Interest rate swap | Derivative designated as hedging instruments
Fair Values of Derivative Financial Instruments
Liabilities, Fair Value	$ 16,548	$ 11,441