Receivables (Schedule Of Activity In The Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Apr. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 53,340	$ 51,746	$ 54,527
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		52,578
Provision	1,226	2,724
Charge-offs	(2,413)	(3,556)
Ending balance		51,746
Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	8,230		7,353
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		7,530
Provision	877	380
Charge-offs	0	0
Ending balance		7,910
All Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	45,110		$ 47,174
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		45,048
Provision	349	2,344
Charge-offs	$ (2,413)	(3,556)
Ending balance		$ 43,836