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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, 2020 | Dec. 31, 2019
Goodwill |  |
Goodwill beginning balance | $ 840,117 | $ 753,718
Goodwill ending balance | 838,428 | 840,117
MicroPact |  |
Goodwill |  |
Goodwill acquired |  | 76,319
Other acquisitions |  |
Goodwill |  |
Goodwill acquired |  | 10,080
Courthouse Technologies, Ltd |  |
Goodwill |  |
Purchase price adjustments related to CHT acquisition | (1,689) |
Enterprise Software |  |
Goodwill |  |
Goodwill beginning balance | 825,949 | 739,550
Goodwill ending balance | 824,260 | 825,949
Enterprise Software | MicroPact |  |
Goodwill |  |
Goodwill acquired |  | 76,319
Enterprise Software | Other acquisitions |  |
Goodwill |  |
Goodwill acquired |  | 10,080
Enterprise Software | Courthouse Technologies, Ltd |  |
Goodwill |  |
Purchase price adjustments related to CHT acquisition | (1,689) |
Appraisal and Tax |  |
Goodwill |  |
Goodwill beginning balance | 14,168 | 14,168
Goodwill ending balance | 14,168 | 14,168
Appraisal and Tax | MicroPact |  |
Goodwill |  |
Goodwill acquired |  | 0
Appraisal and Tax | Other acquisitions |  |
Goodwill |  |
Goodwill acquired |  | $ 0
Appraisal and Tax | Courthouse Technologies, Ltd |  |
Goodwill |  |
Purchase price adjustments related to CHT acquisition | $ 0 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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