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Segment Reporting (Tables) | 12 Months Ended
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Apr. 30, 2013
Summary of Financial Information by Reportable Segment | Segment data for the fiscal years ended April 30, 2012 and 2011 has been revised to properly align with internal management reporting. Fiscal Year Ended April 30, 2013
Segment |  | Outside revenues |  |  | Inter-company revenue |  |  | Depreciation and amortization |  |  | Operating income (loss) |  |  | Interest expense (net) |  |  | Capital expenditures |  |  | Goodwill |  |  | Total assets |
Eastern |  | $ | 168,361 |  |  | $ | 33,738 |  |  | $ | 24,410 |  |  | $ | (3,504) |  |  | $ | 26,509 |  |  | $ | 21,854 |  |  | $ | 16,858 |  |  | $ | 210,889 |
Western |  |  | 205,747 |  |  |  | 65,390 |  |  |  | 26,446 |  |  |  | 20,058 |  |  |  | (1,311) |  |  |  | 30,384 |  |  |  | 86,880 |  |  |  | 348,455 |
Recycling |  |  | 39,131 |  |  |  | (84) |  |  |  | 4,188 |  |  |  | (456) |  |  |  | 5,553 |  |  |  | 915 |  |  |  | 12,190 |  |  |  | 50,830 |
Other |  |  | 42,096 |  |  |  | 1,328 |  |  |  | 1,532 |  |  |  | (3,677) |  |  |  | 10,678 |  |  |  | 1,608 |  |  |  | - |  |  |  | 49,453 |
Eliminations |  |  | - |  |  |  | (100,372) |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  | $ | 455,335 |  |  | $ | - |  |  | $ | 56,576 |  |  | $ | 12,421 |  |  | $ | 41,429 |  |  | $ | 54,761 |  |  | $ | 115,928 |  |  | $ | 659,627 |
Fiscal Year Ended April 30, 2012
Segment |  | Outside revenues |  |  | Inter-company revenue |  |  | Depreciation and amortization |  |  | Operating income (loss) |  |  | Interest expense (net) |  |  | Capital expenditures |  |  | Goodwill |  |  | Total assets |
Eastern |  | $ | 163,063 |  |  | $ | 35,616 |  |  | $ | 25,993 |  |  | $ | (42,130) |  |  | $ | 31,019 |  |  | $ | 22,207 |  |  | $ | 58 |  |  | $ | 177,185 |
Western |  |  | 212,227 |  |  |  | 67,776 |  |  |  | 26,168 |  |  |  | 29,715 |  |  |  | 80 |  |  |  | 27,467 |  |  |  | 89,458 |  |  |  | 333,381 |
Recycling |  |  | 47,934 |  |  |  | (248) |  |  |  | 4,016 |  |  |  | 5,375 |  |  |  | 6,794 |  |  |  | 5,485 |  |  |  | 12,190 |  |  |  | 55,249 |
Other |  |  | 44,726 |  |  |  | 2,714 |  |  |  | 2,238 |  |  |  | (3,993) |  |  |  | 7,073 |  |  |  | 3,204 |  |  |  | - |  |  |  | 67,928 |
Eliminations |  |  | - |  |  |  | (105,858) |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  | $ | 467,950 |  |  | $ | - |  |  | $ | 58,415 |  |  | $ | (11,033) |  |  | $ | 44,966 |  |  | $ | 58,363 |  |  | $ | 101,706 |  |  | $ | 633,743 |
Fiscal Year Ended April 30, 2011
Segment |  | Outside revenues |  |  | Inter-company revenue |  |  | Depreciation and amortization |  |  | Operating income (loss) |  |  | Interest expense (net) |  |  | Capital expenditures |  |  | Goodwill |  |  | Total assets |
Eastern |  | $ | 158,856 |  |  | $ | 38,238 |  |  | $ | 25,081 |  |  | $ | (3,978) |  |  | $ | 23,195 |  |  | $ | 24,600 |  |  | $ | 38 |  |  | $ | 223,229 |
Western |  |  | 207,345 |  |  |  | 63,833 |  |  |  | 26,897 |  |  |  | 32,163 |  |  |  | 2,487 |  |  |  | 25,761 |  |  |  | 88,975 |  |  |  | 335,163 |
Recycling |  |  | 43,557 |  |  |  | (402) |  |  |  | 3,573 |  |  |  | 4,116 |  |  |  | 4,550 |  |  |  | 1,764 |  |  |  | 12,191 |  |  |  | 52,047 |
Other |  |  | 44,927 |  |  |  | 2,788 |  |  |  | 2,570 |  |  |  | (2,873) |  |  |  | 15,257 |  |  |  | 2,603 |  |  |  | - |  |  |  | 80,142 |
Eliminations |  |  | - |  |  |  | (104,457) |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  | $ | 454,685 |  |  | $ | - |  |  | $ | 58,121 |  |  | $ | 29,428 |  |  | $ | 45,489 |  |  | $ | 54,728 |  |  | $ | 101,204 |  |  | $ | 690,581 |
Summary of Revenue Attributable to Services Provided by Company | Amounts of our total revenue attributable to services provided are as follows:
|  | Fiscal Year Ended April 30, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Collection |  | $ | 208,973 |  |  |  | 45.9% |  |  | $ | 205,296 |  |  |  | 43.9% |  |  | $ | 199,892 |  |  |  | 44.0% |
Disposal |  |  | 115,049 |  |  |  | 25.3% |  |  |  | 123,620 |  |  |  | 26.4% |  |  |  | 118,831 |  |  |  | 26.1% |
Power generation |  |  | 11,354 |  |  |  | 2.4% |  |  |  | 11,894 |  |  |  | 2.6% |  |  |  | 12,831 |  |  |  | 2.8% |
Organics and processing |  |  | 45,373 |  |  |  | 10.0% |  |  |  | 40,904 |  |  |  | 8.7% |  |  |  | 39,211 |  |  |  | 8.6% |
Solid waste operations |  |  | 380,749 |  |  |  | 83.6% |  |  |  | 381,714 |  |  |  | 81.6% |  |  |  | 370,765 |  |  |  | 81.5% |
Customer resource solutions |  |  | 35,455 |  |  |  | 7.8% |  |  |  | 38,302 |  |  |  | 8.2% |  |  |  | 40,363 |  |  |  | 8.9% |
Recycling |  |  | 39,131 |  |  |  | 8.6% |  |  |  | 47,934 |  |  |  | 10.2% |  |  |  | 43,557 |  |  |  | 9.6% |
Total revenues |  | $ | 455,335 |  |  |  | 100.0% |  |  | $ | 467,950 |  |  |  | 100.0% |  |  | $ | 454,685 |  |  |  | 100.0% |
We have revised our table of revenue by source to more closely align the types of revenue generated by our operating segments. Amounts for fiscal years ended April 30, 2012 and 2011 have been revised to conform to this presentation.

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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 Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 37 -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. Reference 2: 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 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 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 Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27, 28 -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. Reference 5: 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 6: 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 + Details
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