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Leases (Tables) | 12 Months Ended
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Apr. 30, 2012
Leases [Abstract] |
Leased Property Under Capital Leases By Major Classes |
|  | Asset balances at April 30,
|  | 2012 |  | 2011
Real estate | $ | 11,933 | $ | 11,933
Equipment |  | 2,612 |  | 2,605
|  | 14,545 |  | 14,538
Less accumulated amortization |  | 4,378 |  | 3,918
| $ | 10,167 | $ | 10,620
Schedule of Future Minimum Payments for Capital Leases And Noncancelable Operating Leases |
|  | Capital |  | Operating leases
Years ended April 30, |  | leases |  | leases
2013 | $ | 1,266 | $ | 928
2014 |  | 1,262 |  | 739
2015 |  | 898 |  | 385
2016 |  | 721 |  | 199
2017 |  | 678 |  | 131
Thereafter |  | 12,462 |  | 481
Total minimum lease payments |  | 17,287 | $ | 2,863
Less amount representing interest |  | 7,642 |  |
Present value of net minimum lease payments | $ | 9,645 |  |

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- Definition Schedule of Future Minimum Payments for Capital Leases And Noncancelable Operating Leases [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of long-lived, depreciable assets that are subject to a lease meeting the criteria for capitalization and are used in the normal conduct of business to produce goods and services. Examples may include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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