Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Apr. 30, 2014	Jul. 31, 2013
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	$ 560,331	$ 556,816	$ 465,782
Accumulated Amortization	(212,441)	(201,194)	(185,327)
Net	347,890	355,622	280,455
Tax Services
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	104,580	101,162	93,739
Accumulated Amortization	(75,243)	(72,598)	(74,572)
Net	29,337	28,564	19,167
Tax Services | Reacquired Franchise Rights
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	233,749	233,749	214,330
Accumulated Amortization	(29,152)	(26,136)	(19,235)
Net	204,597	207,613	195,095
Tax Services | Customer Relationships
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	123,130	123,110	100,688
Accumulated Amortization	(62,514)	(59,521)	(51,007)
Net	60,616	63,589	49,681
Tax Services | Noncompete Agreements
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	24,697	24,694	23,024
Accumulated Amortization	(22,408)	(22,223)	(21,789)
Net	2,289	2,471	1,235
Tax Services | Franchise Agreements
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	19,201	19,201	19,201
Accumulated Amortization	(7,254)	(6,934)	(5,974)
Net	11,947	12,267	13,227
Tax Services | Purchased Technology
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	54,974	54,900	14,800
Accumulated Amortization	(15,870)	(13,782)	(12,750)
Net	$ 39,104	$ 41,118	$ 2,050