Receivables (Schedule Of Activity In The Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Premiums Receivable, Allowance for Doubtful Accounts, Provision Charged to Expense	$ 73,682	$ 71,067	$ 71,058
Premiums Receivable, Allowance for Doubtful Accounts, Write Offs Against Allowance	71,198	69,118	76,183
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance	54,527	52,578	57,703
Ending balance	57,011	54,527	52,578
Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Premiums Receivable, Allowance for Doubtful Accounts, Provision Charged to Expense	24,939	27,065	24,619
Premiums Receivable, Allowance for Doubtful Accounts, Write Offs Against Allowance	23,285	27,242	24,479
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance	7,353	7,530	7,390
Ending balance	9,007	7,353	7,530
All Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Premiums Receivable, Allowance for Doubtful Accounts, Provision Charged to Expense	48,743	44,002	46,439
Premiums Receivable, Allowance for Doubtful Accounts, Write Offs Against Allowance	47,913	41,876	51,704
Allowance for Doubtful Accounts [Roll Forward]
Beginning balance	47,174	45,048	50,313
Ending balance	$ 48,004	$ 47,174	$ 45,048