Commitments And Contingencies (Narrative) (Details) (USD $)	Jan. 31, 2015	Apr. 30, 2014	Jan. 31, 2014
Commitments And Contingencies [Line Items]
Standard guarantee accrual amount	$ 9,000,000	$ 11,400,000	$ 15,200,000
Contingent business acquisition obligations	12,848,000	9,206,000
Lines of credit, total obligation	79,200,000
Remaining franchise equity lines of credit-undrawn commitment	23,200,000
Maximum funding by facility	1,500,000,000
Financing Receivables, Line of Credit Facility, Compensating Balances	0
Level 3
Commitments And Contingencies [Line Items]
Contingent business acquisition obligations			$ 10,523,000