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Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jul. 31, 2017 | Jul. 31, 2016 | Apr. 30, 2017
Commitments And Contingencies [Line Items] |  |  |
Standard guarantee accrual amount | $ 4,500 | $ 5,800 | $ 6,800
Contingent business acquisition obligations | 9,125 |  | $ 10,428
Lines of credit, total obligation | 45,200 |  |
Remaining franchise equity lines of credit-undrawn commitment | 20,300 |  |
Loss Contingency Accrual [Roll Forward] |  |  |
Balance, beginning of the period | 2,300 |  |
Balance, end of the period | 1,700 | 2,300 |
Scc [Member] |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |
Balance, beginning of the period | 4,500 | 65,265 |
Loss provisions | 0 | 235 |
Payments | 0 | (40,000) |
Balance, end of the period | $ 4,500 | 25,500 |
Level 3 |  |  |
Commitments And Contingencies [Line Items] |  |  |
Contingent business acquisition obligations |  | $ 8,347 |

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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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