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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
Allowance for doubtful accounts |  |  |
Allowance for Doubtful Accounts and Allowance for Obsolete Equipment and Inventory [Roll Forward] |  |  |
Balance at Beginning of Period | $ 5,904 | $ 5,821 | $ 6,339
Charged to Costs and Expenses | 1,027 | 737 | 2,069
Charged to Other Accounts | (23) | (31) | 404
Deductions Describe | (741) | (623) | (2,991)
Balance at End of Period | 6,167 | 5,904 | 5,821
Allowance for obsolete equipment and inventory |  |  |
Allowance for Doubtful Accounts and Allowance for Obsolete Equipment and Inventory [Roll Forward] |  |  |
Balance at Beginning of Period | 952 | 900 | 750
Charged to Costs and Expenses | 989 | 116 | 208
Charged to Other Accounts | 20 | (41) | (58)
Deductions Describe | (286) | (23) | 0
Balance at End of Period | $ 1,675 | $ 952 | $ 900

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- Definition Valuation allowances and reserves charged to cost and expense increase decrease. + References No definition available. + Details
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- Definition Valuation allowances and reserves charged to other accounts increase decrease. + References No definition available. + Details
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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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