Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011
Goodwill and Intangible Assets [Line Items]
Impairment of goodwill		$ 22,700,000	$ 4,257,000	$ 22,700,000
Amortization of intangible assets	4,700,000	4,500,000	15,200,000	12,800,000
Estimated amortization, 2012			17,700,000
Estimated amortization, 2013			16,500,000
Estimated amortization, 2014			14,600,000
Estimated amortization, 2015			11,300,000
Estimated amortization, 2016			10,700,000
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