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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

X

- 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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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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

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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

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