Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2011	Oct. 31, 2010
Goodwill and Intangible Assets [Line Items]
Impairment of goodwill	$ 4,257,000		$ 4,257,000
Amortization of intangible assets	5,400,000	4,200,000	10,500,000	8,300,000
Estimated amortization, 2012			17,400,000
Estimated amortization, 2013			15,800,000
Estimated amortization, 2014			14,000,000
Estimated amortization, 2015			10,600,000
Estimated amortization, 2016			10,000,000
Tax Services [Member]
Goodwill and Intangible Assets [Line Items]
Impairment of goodwill			4,257,000
ExpressTax Brand [Member]
Goodwill and Intangible Assets [Line Items]
Impairment of goodwill			4,300,000
Customer Relationships [Member] | ExpressTax Brand [Member]
Goodwill and Intangible Assets [Line Items]
Impairment of intangible assets			$ 4,000,000