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Segment Information (Continuing Operations By Reportable Operating Segment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2012 | Jan. 31, 2011 | Jan. 31, 2012 | Jan. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 663,280 | $ 680,296 | $ 893,097 | $ 899,721
Loss from continuing operations before income tax (benefit) | (1,026) | (25,968) | (405,556) | (416,635)
Tax Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 655,701 | 672,810 | 868,144 | 875,376
Loss from continuing operations before income tax (benefit) | 31,716 | 4,114 | (311,733) | (324,865)
Corporate [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 7,579 | 7,486 | 24,953 | 24,345
Loss from continuing operations before income tax (benefit) | $ (32,742) | $ (30,082) | $ (93,823) | $ (91,770)

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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 4 -Section 08 -Paragraph h -Subparagraph 1(i) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 + Details
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- Definition Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph a, b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 + Details
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