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Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) (USD $) In Thousands | Apr. 30, 2011 | Apr. 30, 2010
--- | --- | ---
Gross Carrying Amount | $ 614,399 | $ 586,004
Accumulated Amortization | (246,480) | (218,572)
Net | 367,919 | 367,432
Tax Services [Member] | Customer Relationships [Member] |  |
Gross Carrying Amount | 87,624 | 67,705
Accumulated Amortization | (41,076) | (33,096)
Net | 46,548 | 34,609
Tax Services [Member] | Noncompete Agreements [Member] |  |
Gross Carrying Amount | 23,456 | 23,062
Accumulated Amortization | (22,059) | (21,278)
Net | 1,397 | 1,784
Tax Services [Member] | Reacquired Franchise Rights [Member] |  |
Gross Carrying Amount | 214,330 | 223,773
Accumulated Amortization | (9,961) | (6,096)
Net | 204,369 | 217,677
Tax Services [Member] | Franchise Agreements [Member] |  |
Gross Carrying Amount | 19,201 | 19,201
Accumulated Amortization | (3,093) | (1,813)
Net | 16,108 | 17,388
Tax Services [Member] | Purchased Technology [Member] |  |
Gross Carrying Amount | 14,700 | 14,500
Accumulated Amortization | (8,505) | (6,266)
Net | 6,195 | 8,234
Tax Services [Member] | Trade Name - Amortizing [Member] |  |
Gross Carrying Amount | 1,325 | 1,325
Accumulated Amortization | (600) | (400)
Net | 725 | 925
Business Services [Member] | Customer Relationships [Member] |  |
Gross Carrying Amount | 152,079 | 145,149
Accumulated Amortization | (128,738) | (120,037)
Net | 23,341 | 25,112
Business Services [Member] | Noncompete Agreements [Member] |  |
Gross Carrying Amount | 35,818 | 33,052
Accumulated Amortization | (24,662) | (22,118)
Net | 11,156 | 10,934
Business Services [Member] | Trade Name - Amortizing [Member] |  |
Gross Carrying Amount | 2,600 | 2,600
Accumulated Amortization | (2,600) | (2,600)
Business Services [Member] | Trade Name - non-amortizing [Member] |  |
Gross Carrying Amount | 55,637 | 55,637
Accumulated Amortization | (4,868) | (4,868)
Net | 50,769 | 50,769
Attest Firm Affiliation [Member] |  |
Gross Carrying Amount | 7,629 |
Accumulated Amortization | (318) |
Net | $ 7,311 |

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- Definition The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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- Definition Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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- Definition The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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