SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 234,128	$ 244,514	$ 165,416
ASC 606 Transition Adjustment			66,617
Charges to Cost and Expenses	159,567	478,996	432,755
Deductions	276,881	489,382	420,274
Balance at End of Period	116,814	234,128	244,514
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	710	924	2,093
Charges to Cost and Expenses	16,882	(72)	(140)
Deductions	133	142	1,029
Balance at End of Period	17,459	710	924
Reserve for returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	46,489	62,278	61,179
Charges to Cost and Expenses	41,348	56,440	57,777
Deductions	47,133	72,229	56,678
Balance at End of Period	40,704	46,489	62,278
Reserve for sales allowances
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	186,929	181,312	102,144
ASC 606 Transition Adjustment			66,617
Charges to Cost and Expenses	101,337	422,628	375,118
Deductions	229,615	417,011	362,567
Balance at End of Period	$ 58,651	$ 186,929	$ 181,312