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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Jan. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Activity and Balances Related to Goodwill | The following table shows the activity and balances related to goodwill from April 30, 2013 through January 31, 2014:
|  | April 30, 2013 |  |  | Acquisitions |  |  | January 31, 2014 |
Eastern region (1) |  | $ | 16,858 |  |  | $ | 558 |  |  | $ | 17,416 |
Western region |  |  | 86,880 |  |  |  | 786 |  |  |  | 87,666 |
Recycling |  |  | 12,190 |  |  |  | 63 |  |  |  | 12,253 |
Other |  |  | — |  |  |  | 1,729 |  |  |  | 1,729 |
Total |  | $ | 115,928 |  |  | $ | 3,136 |  |  | $ | 119,064 |
(1) | Included in Eastern region acquisitions activity is a $33 adjustment related to the December 5, 2012 BBI acquisition due to a finalization of the deferred tax liability for BBI at acquisition.
Components of Intangible Assets | Intangible assets as of January 31, 2014 and April 30, 2013 consist of the following:
|  | Covenants Not-to-Compete |  |  | Client Lists |  |  | Total |
Balance, January 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | $ | 17,245 |  |  | $ | 15,760 |  |  | $ | 33,005 |
Less accumulated amortization |  |  | (15,224 | ) |  |  | (3,609 | ) |  |  | (18,833 | )
|  | $ | 2,021 |  |  | $ | 12,151 |  |  | $ | 14,172 |
|  | 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 | Intangible amortization expense for the three and the nine months ended January 31, 2014 and 2013 was $695, $353, $1,804 and $751, respectively. The intangible amortization expense estimated for the five fiscal years following fiscal year 2013 and thereafter is as follows:
2014 |  |  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2018 |  |  | Thereafter |
$ | 750 |  |  | $ | 2,927 |  |  | $ | 2,314 |  |  | $ | 1,874 |  |  | $ | 1,652 |  |  | $ | 4,655 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: 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 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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