STOCK APPRECIATION RIGHTS (VESTING SCHEDULE) (Details) - Stock Appreciation Rights (SARs)	12 Months Ended
	Apr. 30, 2015
Vesting Schedule [Line Items]
Vested At Least One But Less Than Two Years	33.00%
Vested At Least Two But Less Than Three Years	67.00%
Vested Three or More Years	100.00%