Segment Information (Continuing Operations By Reportable Operating Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Segment Reporting Information [Line Items]
Total revenues	$ 199,770	$ 471,979	$ 461,305	$ 705,731
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE TAXES	(347,825)	(96,268)	(711,681)	(427,825)
Tax Services
Segment Reporting Information [Line Items]
Total revenues	193,996	464,634	443,727	684,706
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE TAXES	(322,099)	(64,189)	(625,807)	(335,203)
Corporate And Eliminations
Segment Reporting Information [Line Items]
Total revenues	5,774	7,345	17,578	21,025
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE TAXES	$ (25,726)	$ (32,079)	$ (85,874)	$ (92,622)