Receivables (Schedule Of Activity In The Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Apr. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ 56,381	$ 53,771	$ 57,011
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		54,527
Provision	1,417	713
Charge-offs	(2,047)	(1,469)
Ending balance		53,771
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	0
Charge-offs	0	0
Ending balance		7,353
All Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	46,923		$ 48,004
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance		47,174
Provision	966	713
Charge-offs	$ (2,047)	(1,469)
Ending balance		$ 46,418