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Goodwill (Details) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2016 USD ($) operating_segment | Jan. 31, 2016 USD ($) operating_segment | Feb. 23, 2016 USD ($) | Jul. 31, 2015 USD ($)
Goodwill [Line Items] |  |  |  |
Number of Reportable Segments | operating_segment | 2 | 3 |  |
Reallocation to new segments | $ 137,354,000 |  |  |
Goodwill | 264,503,000 | $ 137,354,000 |  | $ 137,354,000
Additions resulting from TCS acquisition |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 127,149,000 |  | $ 127,149,000 |
Commercial Solutions Segment |  |  |  |
Goodwill [Line Items] |  |  |  |
Reallocation to new segments | 102,100,000 |  |  |
Goodwill | 212,137,000 |  |  |
Commercial Solutions Segment | Additions resulting from TCS acquisition |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 110,037,000 |  |  |
Government Solutions Segment |  |  |  |
Goodwill [Line Items] |  |  |  |
Reallocation to new segments | 35,254,000 |  |  |
Goodwill | 52,366,000 |  |  |
Government Solutions Segment | Additions resulting from TCS acquisition |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | $ 17,112,000 |  |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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