Customer Accounts Receivable - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Feb. 01, 2020	Jan. 31, 2020
Receivables [Abstract]
Customer accounts receivable - current	$ 699,037
Allowance for credit losses for customer accounts receivable - current	(184,509)
Customer accounts receivable, net of allowances	514,528	$ 624,042	$ 673,742
Customer accounts receivable - non current	631,839
Allowance for credit losses for customer accounts receivable - non current	(152,207)
Long-term portion of customer accounts receivable, net of allowances	479,632	$ 614,799	663,761
Total customer accounts receivable, net	$ 994,160		$ 1,337,503