Commitments And Contingencies (Narrative) (Details) (USD $)	Jan. 31, 2014	Apr. 30, 2013	Jan. 31, 2013
Commitments And Contingencies [Line Items]
Standard guarantee accrual amount	$ 15,200,000	$ 18,000,000	$ 14,900,000
Contingent business acquisition obligations	10,523,000	11,277,000
Lines of credit, total obligation	90,900,000
Remaining franchise equity lines of credit-undrawn commitment	19,400,000
Maximum funding by facility	1,500,000,000
Financing Receivables, Line of Credit Facility, Compensating Balances	800,000
Level 3
Commitments And Contingencies [Line Items]
Contingent business acquisition obligations			$ 10,871,000