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Goodwill and Other Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Goodwill [Line Items] |  |
Goodwill Beginning Balance | $ 653,666 | $ 124,142
Goodwill Ending Balance | 650,237 | 653,666
New World Systems Corporation |  |
Goodwill [Line Items] |  |
Goodwill acquired |  | 527,618
Goodwill, purchase price adjustments | (7,372) |
Brazos Technology Corporation |  |
Goodwill [Line Items] |  |
Goodwill acquired |  | 1,906
Small Acquisition |  |
Goodwill [Line Items] |  |
Goodwill acquired | 3,943 |
Enterprise Software Solutions |  |
Goodwill [Line Items] |  |
Goodwill Beginning Balance | 647,109 | 117,585
Goodwill Ending Balance | 643,680 | 647,109
Enterprise Software Solutions | New World Systems Corporation |  |
Goodwill [Line Items] |  |
Goodwill acquired |  | 527,618
Goodwill, purchase price adjustments | (7,372) |
Enterprise Software Solutions | Brazos Technology Corporation |  |
Goodwill [Line Items] |  |
Goodwill acquired |  | 1,906
Enterprise Software Solutions | Small Acquisition |  |
Goodwill [Line Items] |  |
Goodwill acquired | 3,943 |
Appraisal and Tax Software Solutions and Services |  |
Goodwill [Line Items] |  |
Goodwill Beginning Balance | 6,557 | 6,557
Goodwill Ending Balance | 6,557 | 6,557
Appraisal and Tax Software Solutions and Services | New World Systems Corporation |  |
Goodwill [Line Items] |  |
Goodwill acquired |  | 0
Goodwill, purchase price adjustments | 0 |
Appraisal and Tax Software Solutions and Services | Brazos Technology Corporation |  |
Goodwill [Line Items] |  |
Goodwill acquired |  | $ 0
Appraisal and Tax Software Solutions and Services | Small Acquisition |  |
Goodwill [Line Items] |  |
Goodwill acquired | $ 0 |

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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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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the 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 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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