Receivables (Schedule Of Activity In The Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Apr. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 56,062	$ 53,340	$ 57,011
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		54,527
Provision	1,286	1,226
Charge-offs	(2,235)	(2,413)
Ending balance		53,340
Emerald Advance® lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	9,458		9,007
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		7,353
Provision	451	877
Charge-offs	0	0
Ending balance		8,230
All Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	46,604		$ 48,004
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		47,174
Provision	835	349
Charge-offs	$ (2,235)	(2,413)
Ending balance		$ 45,110