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Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Oct. 31, 2012 | Oct. 31, 2011
Allowance for doubtful accounts [Member] |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Valuation allowances and reserves, beginning balance |  |  |  |  | $ 500 | $ 502
Additions (Reductions) Charged to Expense | 81 |  | 107 |  |  |
Additions (Reductions) Charged to Other Accounts | 47 |  | 107 |  |  |
Deductions | 147 | [1] | 216 | [1] |  |
Valuation allowances and reserves, ending balance | 481 |  |  |  | 500 | 502
Inventory obsolescence reserve [Member] |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Valuation allowances and reserves, beginning balance |  |  |  |  | 1,192 | 968
Additions (Reductions) Charged to Expense | 520 |  | (136) |  |  |
Additions (Reductions) Charged to Other Accounts | (318) |  | 365 |  |  |
Deductions | 0 | [2] | 5 | [2] |  |
Valuation allowances and reserves, ending balance | 1,394 |  |  |  | 1,192 | 968
Inventory LIFO reserve [Member] |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Valuation allowances and reserves, beginning balance |  |  |  |  | 9,537 | 7,974
Additions (Reductions) Charged to Expense | (1,560) |  | 1,563 |  |  |
Additions (Reductions) Charged to Other Accounts | 0 |  | 0 |  |  |
Deductions | 0 |  | 0 |  |  |
Valuation allowances and reserves, ending balance | 7,977 |  |  |  | 9,537 | 7,974
Asset impairment reserve [Member] |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Valuation allowances and reserves, beginning balance |  |  |  |  | 757 | 757
Additions (Reductions) Charged to Expense | 72 |  | 0 |  |  |
Additions (Reductions) Charged to Other Accounts | 0 |  | 0 |  |  |
Deductions | 757 | [3] | 0 | [3] |  |
Valuation allowances and reserves, ending balance | 72 |  |  |  | 757 | 757
Deferred tax valuation allowance [Member] |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Valuation allowances and reserves, beginning balance |  |  |  |  | 579 | 452
Additions (Reductions) Charged to Expense | 139 |  | 127 |  |  |
Additions (Reductions) Charged to Other Accounts | 0 |  | 0 |  |  |
Deductions | 0 |  | 0 |  |  |
Valuation allowances and reserves, ending balance | 718 |  |  |  | 579 | 452
Workers' compensation reserve [Member] |  |  |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |
Valuation allowances and reserves, beginning balance |  |  |  |  | 663 | 655
Additions (Reductions) Charged to Expense | 82 |  | 173 |  |  |
Additions (Reductions) Charged to Other Accounts | 0 |  | (6) |  |  |
Deductions | 1 |  | 159 | [4] |  |
Valuation allowances and reserves, ending balance | $ 744 |  |  |  | $ 663 | $ 655
[1] | Accounts determined to be uncollectible, net of recoveries
[2] | Inventory sold or otherwise disposed
[3] | Equipment sold or otherwise disposed
[4] | Payment of workers’ compensation claims

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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + 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, charged to accounts other than costs and expenses in a given period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&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 SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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