Segment Information (Continuing Operations By Reportable Operating Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2011	Oct. 31, 2010
Segment Reporting Information [Line Items]
Revenues	$ 129,194	$ 119,590	$ 229,817	$ 219,425
Loss from continuing operations before tax benefit	(203,929)	(183,516)	(404,530)	(390,667)
Tax Services [Member]
Segment Reporting Information [Line Items]
Revenues	121,018	110,921	212,443	202,566
Loss from continuing operations before tax benefit	(173,966)	(154,355)	(343,449)	(328,979)
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	8,176	8,669	17,374	16,859
Loss from continuing operations before tax benefit	$ (29,963)	$ (29,161)	$ (61,081)	$ (61,688)