Receivables (Schedule Of Activity In The Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Apr. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 53,771	$ 51,400	$ 54,527
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		52,578
Provision	713	2,842
Charge-offs	(1,469)	(4,020)
Ending balance		51,400
Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	7,353		7,353
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		7,530
Provision	0	0
Charge-offs	0	0
Ending balance		7,530
All Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	46,418		$ 47,174
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		45,048
Provision	713	2,842
Charge-offs	$ (1,469)	(4,020)
Ending balance		$ 43,870