Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Apr. 30, 2013	Jul. 31, 2012
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	$ 466,082	$ 464,153	$ 467,243
Accumulated Amortization	(185,627)	(179,714)	(195,710)
Net	280,455	284,439	271,533
Tax Services
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	93,739	91,745	105,648
Accumulated Amortization	(74,572)	(72,764)	(94,240)
Net	19,167	18,981	11,408
Tax Services | Reacquired Franchise Rights
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	214,330	214,330	214,330
Accumulated Amortization	(19,235)	(18,204)	(15,113)
Net	195,095	196,126	199,217
Tax Services | Customer Relationships
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	100,688	100,719	89,839
Accumulated Amortization	(51,007)	(48,733)	(48,298)
Net	49,681	51,986	41,541
Tax Services | Noncompete Agreements
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	23,024	23,058	22,225
Accumulated Amortization	(21,789)	(21,728)	(21,443)
Net	1,235	1,330	782
Tax Services | Franchise Agreements
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	19,201	19,201	19,201
Accumulated Amortization	(5,974)	(5,654)	(4,694)
Net	13,227	13,547	14,507
Tax Services | Purchased Technology
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	14,800	14,800	14,700
Accumulated Amortization	(12,750)	(12,331)	(11,080)
Net	2,050	2,469	3,620
Tax Services | Trade Name
Goodwill and Intangible Assets [Line Items]
Gross Carrying Amount	300	300	1,300
Accumulated Amortization	(300)	(300)	(842)
Net	$ 0	$ 0	$ 458