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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at Beginning of Period |  | $ 155,488 | $ 135,698 | $ 106,181
Charges to Cost and Expenses |  | 337,298 | 307,728 | 249,280
Deductions | [1] | 327,370 | 287,938 | 219,763
Balance at End of Period |  | 165,416 | 155,488 | 135,698
Allowance for doubtful accounts |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at Beginning of Period |  | 1,192 | 1,346 | 1,074
Charges to Cost and Expenses |  | 854 | 682 | 515
Deductions | [1] | (47) | 836 | 243
Balance at End of Period |  | 2,093 | 1,192 | 1,346
Reserve for returns |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at Beginning of Period |  | 59,802 | 61,437 | 52,740
Charges to Cost and Expenses |  | 32,710 | 40,783 | 36,620
Deductions | [1] | 31,333 | 42,418 | 27,923
Balance at End of Period |  | 61,179 | 59,802 | 61,437
Reserve for sales allowances |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at Beginning of Period | [2] | 94,494 | 72,915 | 52,367
Charges to Cost and Expenses | [2] | 303,704 | 266,263 | 212,145
Deductions | [1],[2] | 296,084 | 244,684 | 191,597
Balance at End of Period | [2] | $ 102,144 | $ 94,494 | $ 72,915
[1] | Accounts written off as uncollectible, net of recoveries.
[2] | See Note A in the accompanying Notes to Consolidated Financial Statements for a description of sales allowances.

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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