Segment Information (Continuing Operations By Reportable Operating Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Segment Reporting Information [Line Items]
Total revenues	$ 134,628	$ 134,340	$ 268,214	$ 261,535
LOSS FROM CONTINUING OPERATIONS BEFORE TAXES :	(200,573)	(179,362)	(376,389)	(363,856)
Tax Services [Member]
Segment Reporting Information [Line Items]
Total revenues	128,683	128,040	257,763	249,731
LOSS FROM CONTINUING OPERATIONS BEFORE TAXES :	(176,642)	(159,314)	(327,202)	(303,708)
Corporate And Eliminations
Segment Reporting Information [Line Items]
Total revenues	5,945	6,300	10,451	11,804
LOSS FROM CONTINUING OPERATIONS BEFORE TAXES :	$ (23,931)	$ (20,048)	$ (49,187)	$ (60,148)