Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Goodwill and Intangible Assets [Line Items]
Document Fiscal Year Focus	2014
Gross Carrying Amount	$ 557,116	$ 464,153
Accumulated Amortization	(201,494)	(179,714)
Net	355,622	284,439
Tax Services
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	101,162	91,745
Accumulated Amortization	(72,598)	(72,764)
Net	28,564	18,981
Tax Services | Reacquired Franchise Rights
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	233,749	214,330
Accumulated Amortization	(26,136)	(18,204)
Net	207,613	196,126
Tax Services | Customer Relationships
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	123,110	100,719
Accumulated Amortization	(59,521)	(48,733)
Net	63,589	51,986
Tax Services | Noncompete Agreements
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	24,694	23,058
Accumulated Amortization	(22,223)	(21,728)
Net	2,471	1,330
Tax Services | Franchise Agreements
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	19,201	19,201
Accumulated Amortization	(6,934)	(5,654)
Net	12,267	13,547
Tax Services | Purchased Technology
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	54,900	14,800
Accumulated Amortization	(13,782)	(12,331)
Net	41,118	2,469
Tax Services | Trade Name
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	300	300
Accumulated Amortization	(300)	(300)
Net	$ 0	$ 0