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Self-Insurance Reserves (Details Textual) (USD $) | 6 Months Ended |
--- | --- | ---
Oct. 31, 2012 | Oct. 31, 2011 | Apr. 30, 2012
Self-Insurance Reserves (Textual) [Abstract] |  |  |
Reserves for workers' compensation, product liability, municipal liability, and medical/dental costs | $ 9,300,000 |  | $ 9,000,000
Reserves for workers' compensation, product liability, municipal liability, and medical/dental costs, Non-current portion | 5,500,000 |  | 5,400,000
Reserves for workers' compensation, product liability, municipal liability, and medical/dental costs, included in accrued expenses | 2,400,000 |  | 2,200,000
Reserves for workers' compensation, product liability, municipal liability, and medical/dental costs, included in accrued product/municipal liability | 1,400,000 |  | 0
Workers' compensation receivable classified as an other asset | 332,000 |  |
Amounts charged to expense | 6,200,000 | 5,700,000 |
Accrued reserves for product and municipal litigation liabilities | 4,300,000 |  | 4,500,000
Accrued reserves for product and municipal litigation liabilities, Non-current portion | 2,900,000 |  | 3,100,000
Receivables from insurance carriers, included in other assets | 1,900,000 |  | 2,000,000
Receivables from insurance carriers, included in other current assets | $ 25,000 |  |

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- Definition Receivables from insurance carriers, included in other current assets. + References No definition available. + Details
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- Definition Self insurance reserve included in accrued expenses. + References No definition available. + Details
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- Details
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- Definition Workers compensation receivable. + References No definition available. + Details
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- Definition The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid after one year (or the normal operating cycle, if longer). + References No definition available. + Details
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