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Supplementary Cash Flow Information (Tables) | 6 Months Ended
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Oct. 31, 2012
Supplemental Cash Flow Elements [Abstract] |
Schedule of cash flow supplemental disclosures |
|  | Six Months Ended October 31, |
($ in thousands) |  | 2012 |  |  | 2011 |
State and local income tax payments |  | $ | (19 | ) |  | $ | (60 | )
Federal income tax payments to the Parent |  | $ | (230 | ) |  | $ | (245 | )

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration