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Segment Reporting (Tables) | 3 Months Ended
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Jul. 31, 2013
Segment Reporting [Abstract] |
Summary of Financial Information by Reportable Segment | Segment data for the three months ended July 31, 2012 has been revised to properly align with internal management reporting, which has been modified in the three months ended July 31, 2013 to move organics services from the Eastern region to the Other segment to reflect changes in management structure as these services have become integral to service offerings across our broader geographic solid waste footprint. Three Months Ended July 31, 2013
|  | Outside |  |  | Inter-company |  |  | Depreciation and |  |  | Operating |  |  |  |
Segment |  | revenues |  |  | revenue |  |  | amortization |  |  | income (loss) |  |  | Total assets |
Eastern |  | $ | 38,621 |  |  | $ | 10,431 |  |  | $ | 6,381 |  |  | $ | 1,626 |  |  | $ | 205,410 |
Western |  |  | 57,347 |  |  |  | 19,261 |  |  |  | 7,233 |  |  |  | 6,896 |  |  |  | 346,986 |
Recycling |  |  | 11,184 |  |  |  | (5 | ) |  |  | 1,065 |  |  |  | (44 | ) |  |  | 50,857 |
Other |  |  | 21,406 |  |  |  | 512 |  |  |  | 518 |  |  |  | 1,259 |  |  |  | 71,491 |
Eliminations |  |  | — |  |  |  | (30,199 | ) |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 128,558 |  |  | $ | — |  |  | $ | 15,197 |  |  | $ | 9,737 |  |  | $ | 674,744 |
Three Months Ended July 31, 2012
|  | Outside |  |  | Inter-company |  |  | Depreciation and |  |  | Operating |  |  |  |
Segment |  | revenues |  |  | revenue (1) |  |  | amortization |  |  | income (loss) |  |  | Total assets |
Eastern |  | $ | 33,807 |  |  | $ | 8,135 |  |  | $ | 6,537 |  |  | $ | (577 | ) |  | $ | 168,621 |
Western |  |  | 52,553 |  |  |  | 16,758 |  |  |  | 6,421 |  |  |  | 6,245 |  |  |  | 347,735 |
Recycling |  |  | 11,162 |  |  |  | 1 |  |  |  | 1,097 |  |  |  | — |  |  |  | 54,085 |
Other |  |  | 20,116 |  |  |  | 1,215 |  |  |  | 654 |  |  |  | 139 |  |  |  | 72,833 |
Eliminations |  |  | — |  |  |  | (26,109 | ) |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 117,638 |  |  | $ | — |  |  | $ | 14,709 |  |  | $ | 5,807 |  |  | $ | 643,274 |
Summary of Revenue Attributable to Services Provided by Company | Amounts of our total revenue attributable to services provided are as follows:
|  | Three Months Ended July 31, |
|  | 2013 |  |  | 2012 |
Collection |  | $ | 58,313 |  |  | $ | 53,033 |
Disposal |  |  | 35,123 |  |  |  | 30,967 |
Power generation |  |  | 2,041 |  |  |  | 2,663 |
Processing |  |  | 2,851 |  |  |  | 1,435 |
Solid waste operations |  |  | 98,328 |  |  |  | 88,098 |
Organics |  |  | 9,877 |  |  |  | 8,853 |
Customer solutions |  |  | 9,169 |  |  |  | 9,525 |
Recycling |  |  | 11,184 |  |  |  | 11,162 |
Total revenues |  | $ | 128,558 |  |  | $ | 117,638 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 + Details
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