Guarantor Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Jan. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Borrowings on warehouse facility			$ 79,940	$ 0
Cash and Cash Equivalents, at Carrying Value	$ 12,742	$ 59,065	23,566	12,254	$ 12,742	$ 23,566
Restricted cash					71,099	110,698
Accounts Receivable, Net, Current					635,700	702,162
Other Receivables, Net, Current					63,203	69,286
Inventory, Net					235,479	164,856
Other Assets, Current					15,915	17,105
Total current assets					1,034,138	1,087,673
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					0	0
Accounts Receivable, Net, Noncurrent					616,665	615,904
Property, Plant and Equipment, Net					144,747	159,202
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent					72,554	71,442
Other Assets, Noncurrent					6,285	6,913
Total assets					1,874,389	1,941,134
Current maturities of long-term debt:					65,651	849
Accounts Payable, Current					109,738	101,612
Accrued Liabilities and Other Liabilities					64,916	43,099
Other Liabilities, Current					22,018	21,821
Total current liabilities					262,323	167,381
Deferred rent					87,152	87,957
Long-term debt and capital lease obligations					973,278	1,144,393
Other Liabilities, Noncurrent					22,245	23,613
Total liabilities					1,344,998	1,423,344
Total stockholders' equity					529,391	517,790
Total liabilities and stockholders' equity					1,874,389	1,941,134
Revenue, Net	291,808	308,033	857,506	958,574
Financial Services Revenue	81,364	68,740	238,139	205,469
Contractually Specified Servicing Fees, Amount	0	0	0	0
Total revenues	373,172	376,773	1,095,645	1,164,043
Cost of Goods Sold	175,591	192,374	519,847	605,709
Selling, General and Administrative Expense	114,355	114,457	332,524	347,550
Provision for bad debts	56,512	51,564	161,891	169,978
Charges and credits	5,861	1,987	11,156	5,408
Total costs and expenses	352,319	360,382	1,025,418	1,128,645
Operating income	20,853	16,391	70,227	35,398
Interest expense	18,095	23,470	62,142	73,504
Loss on extinguishment of debt	461	0	2,907	0
Income (loss) before income taxes	2,297	(7,079)	5,178	(38,106)
Provision (benefit) for income taxes	728	(3,264)	1,916	(12,618)
Net income (loss) before consolidation	1,569	(3,815)	3,262	(25,488)
Income (loss) from consolidated subsidiaries (after tax)	0	0	0	0
Net income (loss)	1,569	(3,815)	3,262	(25,488)
Net Cash Provided by (Used in) Operating Activities			82,737	183,011
Payments to Acquire Receivables			0	0
Proceeds from Sale and Collection of Receivables			0	0
Payments to Acquire Property, Plant, and Equipment			(11,995)	(41,804)
Proceeds from Sale of Property, Plant, and Equipment			0	686
Net Cash Provided by (Used in) Investing Activities, Intercompany Net Change				0
Net cash used in investing activities			(11,995)	(41,118)
Proceeds from issuance of asset backed notes, net of original issue discount			469,814	1,067,850
Payments on asset backed notes			(816,243)	(736,266)
Changes in restricted cash balances			39,599	(87,900)
Borrowings from revolving credit facility			1,257,052	529,352
Payments on revolving credit facility			(1,082,552)	(858,559)
Payment of debt issuance costs and amendment fees			(8,172)	(9,775)
Payments on warehouse facility			(23,066)	0
Proceeds from stock issued under employee benefit plans			3,011	824
Net Cash Provided by (Used in) Financing Activities, Intercompany Net Change				0
Proceeds from (Payments for) Other Financing Activities, Including Excess Tax Benefit from Share-based Compensation			(949)	(608)
Net cash used in financing activities			(81,566)	(95,082)
Net change in cash and cash equivalents			(10,824)	46,811
Cash and cash equivalents, beginning of period			23,566	12,254
Cash and cash equivalents, end of period	12,742	59,065	12,742	59,065
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Borrowings on warehouse facility			0
Cash and Cash Equivalents, at Carrying Value	0	0	0	0	0	0
Restricted cash					0	0
Accounts Receivable, Net, Current					0	0
Other Receivables, Net, Current					0	0
Inventory, Net					0	0
Other Assets, Current					(5,337)	(11,768)
Total current assets					(5,337)	(11,768)
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					(876,073)	(898,256)
Accounts Receivable, Net, Noncurrent					0	0
Property, Plant and Equipment, Net					0	0
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent					0	0
Other Assets, Noncurrent					0	0
Total assets					(881,410)	(910,024)
Current maturities of long-term debt:					0	0
Accounts Payable, Current					0	0
Accrued Liabilities and Other Liabilities					(2,949)	(4,399)
Other Liabilities, Current					(2,387)	(7,370)
Total current liabilities					(5,336)	(11,769)
Deferred rent					0	0
Long-term debt and capital lease obligations					0	0
Other Liabilities, Noncurrent					0	0
Total liabilities					(5,336)	(11,769)
Total stockholders' equity					(876,073)	(898,255)
Total liabilities and stockholders' equity					(881,409)	(910,024)
Revenue, Net	0	0	0	0
Financial Services Revenue	0	0	0	0
Contractually Specified Servicing Fees, Amount	(18,178)	(15,073)	(46,010)	(45,384)
Total revenues	(18,178)	(15,073)	(46,010)	(45,384)
Cost of Goods Sold	0	0	0	0
Selling, General and Administrative Expense	(18,178)	(15,073)	(46,010)	(45,384)
Provision for bad debts	0	0	0	0
Charges and credits	0	0	0	0
Total costs and expenses	(18,178)	(15,073)	(46,010)	(45,384)
Operating income	0	0	0	0
Interest expense	0	0	0	0
Loss on extinguishment of debt	0	0	0
Income (loss) before income taxes	0	0	0	0
Provision (benefit) for income taxes	0	0	0	0
Net income (loss) before consolidation	0	0	0	0
Income (loss) from consolidated subsidiaries (after tax)	(6,730)	3,412	26,753	54,780
Net income (loss)	(6,730)	3,412	26,753	54,780
Net Cash Provided by (Used in) Operating Activities			0	0
Payments to Acquire Receivables			544,833	1,038,226
Proceeds from Sale and Collection of Receivables			(544,833)	(1,038,226)
Payments to Acquire Property, Plant, and Equipment			0	0
Proceeds from Sale of Property, Plant, and Equipment			0	0
Net Cash Provided by (Used in) Investing Activities, Intercompany Net Change				(12,719)
Net cash used in investing activities			0	(12,719)
Proceeds from issuance of asset backed notes, net of original issue discount			0	0
Payments on asset backed notes			0	0
Changes in restricted cash balances			0	0
Borrowings from revolving credit facility			0	0
Payments on revolving credit facility			0	0
Payment of debt issuance costs and amendment fees			0	0
Payments on warehouse facility			0
Proceeds from stock issued under employee benefit plans				0
Net Cash Provided by (Used in) Financing Activities, Intercompany Net Change				12,719
Proceeds from (Payments for) Other Financing Activities, Including Excess Tax Benefit from Share-based Compensation			0	0
Net cash used in financing activities			0	12,719
Net change in cash and cash equivalents			0	0
Cash and cash equivalents, beginning of period			0	0
Cash and cash equivalents, end of period	0	0	0	0
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Borrowings on warehouse facility			0
Cash and Cash Equivalents, at Carrying Value	0	0	0	0	0	0
Restricted cash					0	0
Accounts Receivable, Net, Current					0	0
Other Receivables, Net, Current					0	0
Inventory, Net					0	0
Other Assets, Current					0	0
Total current assets					0	0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					682,391	678,149
Accounts Receivable, Net, Noncurrent					0	0
Property, Plant and Equipment, Net					0	0
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent					72,554	71,442
Other Assets, Noncurrent					0	0
Total assets					754,945	749,591
Current maturities of long-term debt:					0	0
Accounts Payable, Current					0	0
Accrued Liabilities and Other Liabilities					4,800	686
Other Liabilities, Current					0	0
Total current liabilities					4,800	686
Deferred rent					0	0
Long-term debt and capital lease obligations					220,754	219,768
Other Liabilities, Noncurrent					0	0
Total liabilities					225,554	220,454
Total stockholders' equity					529,391	529,137
Total liabilities and stockholders' equity					754,945	749,591
Revenue, Net	0	0	0	0
Financial Services Revenue	0	0	0	0
Contractually Specified Servicing Fees, Amount	0	0	0	0
Total revenues	0	0	0	0
Cost of Goods Sold	0	0	0	0
Selling, General and Administrative Expense	0	0	0	0
Provision for bad debts	0	0	0	0
Charges and credits	0	0	0	0
Total costs and expenses	0	0	0	0
Operating income	0	0	0	0
Interest expense	4,443	4,447	13,329	13,290
Loss on extinguishment of debt	0		0
Income (loss) before income taxes	(4,443)	(4,447)	(13,329)	(13,290)
Provision (benefit) for income taxes	(1,408)	(2,051)	(4,934)	(4,400)
Net income (loss) before consolidation	(3,035)	(2,396)	(8,395)	(8,890)
Income (loss) from consolidated subsidiaries (after tax)	4,742	(1,419)	11,657	(16,598)
Net income (loss)	1,707	(3,815)	3,262	(25,488)
Net Cash Provided by (Used in) Operating Activities			(3,011)	(13,544)
Payments to Acquire Receivables			0	0
Proceeds from Sale and Collection of Receivables			0	0
Payments to Acquire Property, Plant, and Equipment			0	0
Proceeds from Sale of Property, Plant, and Equipment			0	0
Net Cash Provided by (Used in) Investing Activities, Intercompany Net Change				12,719
Net cash used in investing activities			0	12,719
Proceeds from issuance of asset backed notes, net of original issue discount			0	0
Payments on asset backed notes			0	0
Changes in restricted cash balances			0	0
Borrowings from revolving credit facility			0	0
Payments on revolving credit facility			0	0
Payment of debt issuance costs and amendment fees			0	0
Payments on warehouse facility			0
Proceeds from stock issued under employee benefit plans				824
Net Cash Provided by (Used in) Financing Activities, Intercompany Net Change				0
Proceeds from (Payments for) Other Financing Activities, Including Excess Tax Benefit from Share-based Compensation			0	1
Net cash used in financing activities			3,011	825
Net change in cash and cash equivalents			0	0
Cash and cash equivalents, beginning of period			0	0
Cash and cash equivalents, end of period	0	0	0	0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Borrowings on warehouse facility			0
Cash and Cash Equivalents, at Carrying Value	12,742	59,065	23,566	12,254	12,742	23,566
Restricted cash					0	0
Accounts Receivable, Net, Current					275,614	173,054
Other Receivables, Net, Current					63,203	69,286
Inventory, Net					235,479	164,856
Other Assets, Current					18,865	21,505
Total current assets					605,903	452,267
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					193,682	220,107
Accounts Receivable, Net, Noncurrent					385,629	295,522
Property, Plant and Equipment, Net					144,747	159,202
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent					0	0
Other Assets, Noncurrent					6,285	6,913
Total assets					1,336,246	1,134,011
Current maturities of long-term debt:					699	849
Accounts Payable, Current					109,738	101,612
Accrued Liabilities and Other Liabilities					59,463	40,287
Other Liabilities, Current					21,342	25,230
Total current liabilities					191,242	167,978
Deferred rent					87,152	87,957
Long-term debt and capital lease obligations					356,514	179,044
Other Liabilities, Noncurrent					18,946	20,883
Total liabilities					653,854	455,862
Total stockholders' equity					682,391	678,149
Total liabilities and stockholders' equity					1,336,245	1,134,011
Revenue, Net	291,808	308,033	857,506	958,574
Financial Services Revenue	45,228	22,326	122,305	85,560
Contractually Specified Servicing Fees, Amount	18,178	15,073	46,010	45,384
Total revenues	355,214	345,432	1,025,821	1,089,518
Cost of Goods Sold	175,591	192,374	519,847	605,709
Selling, General and Administrative Expense	125,355	114,457	343,043	347,550
Provision for bad debts	44,454	31,672	64,438	88,084
Charges and credits	5,861	1,987	11,156	5,408
Total costs and expenses	351,261	340,490	938,484	1,046,751
Operating income	3,953	4,942	87,337	42,767
Interest expense	4,979	3,876	7,501	10,496
Loss on extinguishment of debt	0		349
Income (loss) before income taxes	(1,026)	1,066	79,487	32,271
Provision (benefit) for income taxes	(324)	492	29,420	10,685
Net income (loss) before consolidation	(702)	574	50,067	21,586
Income (loss) from consolidated subsidiaries (after tax)	1,988	(1,993)	(38,410)	(38,184)
Net income (loss)	1,286	(1,419)	11,657	(16,598)
Net Cash Provided by (Used in) Operating Activities			(635,568)	(606,570)
Payments to Acquire Receivables			0	0
Proceeds from Sale and Collection of Receivables			544,833	1,038,226
Payments to Acquire Property, Plant, and Equipment			(11,995)	(41,804)
Proceeds from Sale of Property, Plant, and Equipment			0	686
Net cash used in investing activities			532,838	997,108
Proceeds from issuance of asset backed notes, net of original issue discount			0	0
Payments on asset backed notes			(78,780)	0
Changes in restricted cash balances			0	0
Borrowings from revolving credit facility			1,257,052	529,352
Payments on revolving credit facility			(1,082,552)	(858,559)
Payment of debt issuance costs and amendment fees			(2,865)	(1,192)
Payments on warehouse facility			0
Proceeds from stock issued under employee benefit plans				0
Net Cash Provided by (Used in) Financing Activities, Intercompany Net Change				(12,719)
Proceeds from (Payments for) Other Financing Activities, Including Excess Tax Benefit from Share-based Compensation			(949)	(609)
Net cash used in financing activities			91,906	(343,727)
Net change in cash and cash equivalents			(10,824)	46,811
Cash and cash equivalents, beginning of period			23,566	12,254
Cash and cash equivalents, end of period	12,742	59,065	12,742	59,065
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Borrowings on warehouse facility			79,940
Cash and Cash Equivalents, at Carrying Value	0	0	0	0	0	0
Restricted cash					71,099	110,698
Accounts Receivable, Net, Current					360,086	529,108
Other Receivables, Net, Current					0	0
Inventory, Net					0	0
Other Assets, Current					2,387	7,368
Total current assets					433,572	647,174
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					0	0
Accounts Receivable, Net, Noncurrent					231,036	320,382
Property, Plant and Equipment, Net					0	0
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent					0	0
Other Assets, Noncurrent					0	0
Total assets					664,608	967,556
Current maturities of long-term debt:					64,952	0
Accounts Payable, Current					0	0
Accrued Liabilities and Other Liabilities					3,602	6,525
Other Liabilities, Current					3,063	3,961
Total current liabilities					71,617	10,486
Deferred rent					0	0
Long-term debt and capital lease obligations					396,010	745,581
Other Liabilities, Noncurrent					3,299	2,730
Total liabilities					470,926	758,797
Total stockholders' equity					193,682	208,759
Total liabilities and stockholders' equity					$ 664,608	$ 967,556
Revenue, Net	0	0	0	0
Financial Services Revenue	36,136	46,414	115,834	119,909
Contractually Specified Servicing Fees, Amount	0	0	0	0
Total revenues	36,136	46,414	115,834	119,909
Cost of Goods Sold	0	0	0	0
Selling, General and Administrative Expense	7,178	15,073	35,491	45,384
Provision for bad debts	12,058	19,892	97,453	81,894
Charges and credits	0	0	0	0
Total costs and expenses	19,236	34,965	132,944	127,278
Operating income	16,900	11,449	(17,110)	(7,369)
Interest expense	8,673	15,147	41,312	49,718
Loss on extinguishment of debt	461		2,558
Income (loss) before income taxes	7,766	(3,698)	(60,980)	(57,087)
Provision (benefit) for income taxes	2,460	(1,705)	(22,570)	(18,903)
Net income (loss) before consolidation	5,306	(1,993)	(38,410)	(38,184)
Income (loss) from consolidated subsidiaries (after tax)	0	0	0	0
Net income (loss)	5,306	(1,993)	(38,410)	(38,184)
Net Cash Provided by (Used in) Operating Activities			721,316	803,125
Payments to Acquire Receivables			(544,833)	(1,038,226)
Proceeds from Sale and Collection of Receivables			0	0
Payments to Acquire Property, Plant, and Equipment			0	0
Proceeds from Sale of Property, Plant, and Equipment			0	0
Net cash used in investing activities			(544,833)	(1,038,226)
Proceeds from issuance of asset backed notes, net of original issue discount			469,814	1,067,850
Payments on asset backed notes			(737,463)	(736,266)
Changes in restricted cash balances			39,599	(87,900)
Borrowings from revolving credit facility			0	0
Payments on revolving credit facility			0	0
Payment of debt issuance costs and amendment fees			(5,307)	(8,583)
Payments on warehouse facility			(23,066)
Proceeds from stock issued under employee benefit plans				0
Proceeds from (Payments for) Other Financing Activities, Including Excess Tax Benefit from Share-based Compensation			0	0
Net cash used in financing activities			(176,483)	235,101
Net change in cash and cash equivalents			0	0
Cash and cash equivalents, beginning of period			0	0
Cash and cash equivalents, end of period	$ 0	$ 0	$ 0	$ 0