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Employee Benefit And Retirement Plans (Schedule Of Assumptions Used To Determine Benenfit Obligations And Earnings Effects For Pension Plans) (Details) | 12 Months Ended |
--- | --- | ---
Apr. 30, 2014 | Apr. 30, 2013 | Apr. 30, 2012 | Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Discount rate | 4.56% |  | 4.21% |  |  |  |  |
Pension Plan, Defined Benefit [Member] |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Discount rate | 4.21% |  | 4.66% |  | 4.76% | [1] | 5.66% | [1]
Expected return on plan assets | 7.50% |  | 7.50% |  | 8.00% |  |  |
Rate of compensation increase |  | [2] |  | [2] | 4.00% |  |  |
[1] | The discount rate was 5.66% from May 1, 2011 to December 31, 2011 and 4.76% from January 1, 2012 to April 30, 2012. The rate changed during fiscal 2012 as a result of the required re-measurement of the Company's pension liability upon its decision to freeze its pension plans.
[2] | The rate of compensation increase is not applicable for periods beyond April 30, 2012 because the Company froze its pension plans effective as of that date.

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- Definition The interest rate used to adjust for the time value of money for the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512013 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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