Receivables (Schedule Of Receivables Based On Year Of Origination) (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2016 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Document Fiscal Year Focus	2016
Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, Net	$ 25,961
Year Of Origination 2016 [Member] | Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, Net	10,867
Year Of Origination 2015 [Member] | Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, Net	2,789
Year Of Origination 2014 and prior | Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, Net	(2,127)
Revolving loans | Emerald Advance lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, Net	$ 14,432