Segment Information (Continuing Operations By Reportable Operating Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 96,489	$ 100,623
Loss from continuing operations before tax benefit	(169,269)	(200,601)
Tax Services [Member]
Segment Reporting Information [Line Items]
Revenues	90,253	91,425
Loss from continuing operations before tax benefit	(140,905)	(169,483)
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	6,236	9,198
Loss from continuing operations before tax benefit	$ (28,364)	$ (31,118)