CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2020	Jan. 31, 2020
Current assets:
Cash and cash equivalents	$ 6,385	$ 5,485
Restricted Cash and Cash Equivalents	63,836	75,370
Customer accounts receivable - current	699,037
Accounts Receivable, Allowance for Credit Loss, Current	184,509
Customer accounts receivable, net of allowances (includes VIE balances of $288,330 and $393,764, respectively)	514,528	673,742
Other accounts receivable	55,335	68,753
Inventories	180,893	219,756
Income taxes receivable	15,539	4,315
Prepaid expenses and other current assets	9,440	11,445
Total current assets	845,956	1,058,866
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	479,632	663,761
Property and equipment, net	192,300	173,031
Operating lease assets	266,046	242,457
Deferred income taxes	43,243	18,599
Other assets	14,523	12,055
Total assets	1,841,700	2,168,769
Current liabilities:
Current finance lease obligations	758	605
Accounts payable	63,269	48,554
Accrued compensation and related expenses	15,567	10,795
Accrued expenses	58,152	52,295
Operating lease liability - current	38,003	35,390
Income taxes payable	2,149	2,394
Deferred revenues and other credits	15,935	12,237
Total current liabilities	193,833	162,270
Operating lease liability - non current	355,577	329,081
Long-term Debt and Lease Obligation	748,902	1,025,535
Other long-term liabilities	24,802	24,703
Total liabilities	1,323,114	1,541,589
Commitments and contingencies
Stockholders’ equity:
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	326	321
Treasury Stock, Value	(66,290)	(66,290)
Additional paid-in capital	126,086	122,513
Retained earnings	458,464	570,636
Total stockholders’ equity	518,586	627,180
Total liabilities and stockholders’ equity	1,841,700	2,168,769
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted cash	$ 63,836	$ 75,370
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)
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	$ 479,632	$ 663,761
Document Period End Date	Jul. 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
Long-term debt	$ 457,807
Restricted Cash and Cash Equivalents Items [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	100,000,000
Customer accounts receivable, net of allowances (includes VIE balances of $288,330 and $393,764, respectively)	$ 514,528	673,742
Common Stock [Member]
Stockholders’ equity:
Total stockholders’ equity	$ 326	$ 321
Condensed Balance Sheet Statements, Captions [Line Items]
Shares, Outstanding	32,615,887	32,125,055
Restricted Cash and Cash Equivalents Items [Line Items]
Shares, Outstanding	32,615,887	32,125,055
Variable Interest Entity [Member]
Current assets:
Restricted Cash and Cash Equivalents	$ 61,901	$ 73,214
Customer accounts receivable, net of allowances (includes VIE balances of $288,330 and $393,764, respectively)	254,124	393,764
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	158,264	420,454
Total assets	479,831	887,739
Current liabilities:
Total liabilities	466,559	781,222
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted cash	61,901	73,214
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	158,264	420,454
Long-term debt	455,534	768,121
Customer accounts receivable, net of allowances (includes VIE balances of $288,330 and $393,764, respectively)	$ 254,124	$ 393,764