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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Apr. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Activity and Balances Related to Goodwill | The following tables show the activity and balances related to goodwill from April 30, 2012 through April 30, 2014:
|  | April 30, 2013 |  |  | Acquisitions |  |  | Other (1) |  |  | April 30, 2014 |
Eastern region |  | $ | 16,858 |  |  | $ | 539 |  |  | $ | 32 |  |  | $ | 17,429 |
Western region |  |  | 86,880 |  |  |  | 790 |  |  |  | (4 | ) |  |  | 87,666 |
Recycling |  |  | 12,190 |  |  |  | 125 |  |  |  | — |  |  |  | 12,315 |
Other |  |  | — |  |  |  | 1,729 |  |  |  | — |  |  |  | 1,729 |
Total |  | $ | 115,928 |  |  | $ | 3,183 |  |  | $ | 28 |  |  | $ | 119,139 |
|  | April 30, 2012 |  |  | Acquisitions |  |  | Other (2) |  |  | April 30, 2013 |
Eastern region |  | $ | 58 |  |  | $ | 12,939 |  |  | $ | 3,861 |  |  | $ | 16,858 |
Western region |  |  | 89,458 |  |  |  | 1,283 |  |  |  | (3,861 | ) |  |  | 86,880 |
Recycling |  |  | 12,190 |  |  |  | — |  |  |  | — |  |  |  | 12,190 |
Total |  | $ | 101,706 |  |  | $ | 14,222 |  |  | $ | — |  |  | $ | 115,928 |
(1) | Goodwill adjustments related to prior year acquisition activity, including the finalization of the deferred tax liability associated with the December 5, 2012 BBI acquisition.
(2) | Goodwill reclassification between the Eastern and Western regions is associated with the realignment of certain operations between the reporting units during fiscal year 2013.
Components of Intangible Assets | Intangible assets as of April 30, 2014 and 2013 consist of the following:
|  | Covenants Not-to-Compete |  |  | Client Lists |  |  | Total |
Balance, April 30, 2014 |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | $ | 17,245 |  |  | $ | 15,760 |  |  | $ | 33,005 |
Less accumulated amortization |  |  | (15,363 | ) |  |  | (4,222 | ) |  |  | (19,585 | )
|  | $ | 1,882 |  |  | $ | 11,538 |  |  | $ | 13,420 |
|  | Covenants Not-to-Compete |  |  | Client Lists |  |  | Total |
Balance, April 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | $ | 17,043 |  |  | $ | 11,660 |  |  | $ | 28,703 |
Less accumulated amortization |  |  | (14,800 | ) |  |  | (2,229 | ) |  |  | (17,029 | )
|  | $ | 2,243 |  |  | $ | 9,431 |  |  | $ | 11,674 |
Estimated Amortization Expenses | The intangible amortization expense estimated as of April 30, 2014 for the five fiscal years following fiscal year 2014 and thereafter is as follows:
2015 |  | 2016 |  |  | 2017 |  |  | 2018 |  |  | 2019 |  |  | Thereafter |
$2,925 |  | $ | 2,314 |  |  | $ | 1,874 |  |  | $ | 1,652 |  |  | $ | 1,449 |  |  | $ | 3,206 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 + Details
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