CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2020	Jan. 31, 2020
Current assets:
Cash and cash equivalents	$ 107,822	$ 5,485
Restricted Cash and Cash Equivalents	78,374	75,370
Customer accounts receivable - current	666,294
Accounts Receivable, Allowance for Credit Loss, Current	176,453
Customer accounts receivable, net of allowances (includes VIE balances of $322,235 and $393,764, respectively)	489,841	673,742
Other accounts receivable	56,414	68,753
Inventories	216,161	219,756
Income taxes receivable	10,631	4,315
Prepaid expenses and other current assets	9,944	11,445
Total current assets	969,187	1,058,866
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	444,352	663,761
Property and equipment, net	191,079	173,031
Operating lease assets	269,770	242,457
Deferred income taxes	44,725	18,599
Other assets	14,343	12,055
Total assets	1,933,456	2,168,769
Current liabilities:
Current finance lease obligations	769	605
Accounts payable	74,338	48,554
Accrued compensation and related expenses	23,673	10,795
Accrued expenses	66,518	52,295
Operating lease liability - current	37,663	35,390
Income taxes payable	1,036	2,394
Deferred revenues and other credits	12,765	12,237
Total current liabilities	216,762	162,270
Operating lease liability - non current	362,035	329,081
Long-term Debt and Lease Obligation	800,586	1,025,535
Other long-term liabilities	25,602	24,703
Total liabilities	1,404,985	1,541,589
Commitments and contingencies
Stockholders’ equity:
Total stockholders’ equity	528,471	627,180
Total liabilities and stockholders’ equity	1,933,456	2,168,769
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted cash	78,374	75,370
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	444,352	$ 663,761
Long-term debt	$ 574,609
Document Period End Date	Oct. 31, 2020
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000
Preferred Stock, Shares Outstanding	0
Preferred Stock, Shares Issued	0
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	100,000,000
Treasury Stock, Shares	(3,485,441)	(3,485,441)
Customer accounts receivable, net of allowances (includes VIE balances of $322,235 and $393,764, respectively)	$ 489,841	$ 673,742
Class of Stock [Line Items]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	326	321
Treasury Stock, Value	66,290	66,290
Additional paid-in capital	128,552	122,513
Retained earnings	465,883	570,636
Stockholders' equity	528,471	627,180
Common Stock [Member]
Stockholders’ equity:
Total stockholders’ equity	$ 326	$ 321
Condensed Balance Sheet Statements, Captions [Line Items]
Shares, Outstanding	32,645,472	32,125,055
Class of Stock [Line Items]
Stockholders' equity	$ 326	$ 321
Variable Interest Entity [Member]
Current assets:
Restricted Cash and Cash Equivalents	76,438	73,214
Customer accounts receivable, net of allowances (includes VIE balances of $322,235 and $393,764, respectively)	322,235	393,764
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	263,866	420,454
Total assets	668,492	887,739
Current liabilities:
Total liabilities	582,924	781,222
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted cash	76,438	73,214
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	263,866	420,454
Long-term debt	570,991	768,121
Customer accounts receivable, net of allowances (includes VIE balances of $322,235 and $393,764, respectively)	$ 322,235	$ 393,764