GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Goodwill
Goodwill beginning balance	$ 2,359,674	$ 838,428
Goodwill ending balance	2,489,308	2,359,674
NIC
Goodwill
Goodwill acquired		1,446,868
Purchase price adjustment related to the purchase of other acquisitions/ VendEngine		(17,200)
VendEngine
Goodwill
Goodwill acquired		54,456
Purchase price adjustment related to the purchase of other acquisitions/ VendEngine	(204)	(4,400)
US eDirect
Goodwill
Goodwill acquired	91,441
Rapid
Goodwill
Goodwill acquired	40,005
Other acquisitions
Goodwill
Goodwill acquired		19,922
Purchase price adjustment related to the purchase of other acquisitions/ VendEngine	(1,608)
Enterprise Software
Goodwill
Goodwill beginning balance	836,505	762,127
Goodwill ending balance	834,693	836,505
Enterprise Software \| NIC
Goodwill
Goodwill acquired		0
Enterprise Software \| VendEngine
Goodwill
Goodwill acquired		54,456
Purchase price adjustment related to the purchase of other acquisitions/ VendEngine	(204)
Enterprise Software \| US eDirect
Goodwill
Goodwill acquired	0
Enterprise Software \| Rapid
Goodwill
Goodwill acquired	0
Enterprise Software \| Other acquisitions
Goodwill
Goodwill acquired		19,922
Purchase price adjustment related to the purchase of other acquisitions/ VendEngine	(1,608)
Platform Technologies
Goodwill
Goodwill beginning balance	1,523,169	76,301
Goodwill ending balance	1,654,615	1,523,169
Platform Technologies \| NIC
Goodwill
Goodwill acquired		1,446,868
Platform Technologies \| VendEngine
Goodwill
Goodwill acquired		0
Purchase price adjustment related to the purchase of other acquisitions/ VendEngine	0
Platform Technologies \| US eDirect
Goodwill
Goodwill acquired	91,441
Platform Technologies \| Rapid
Goodwill
Goodwill acquired	40,005
Platform Technologies \| Other acquisitions
Goodwill
Goodwill acquired		$ 0
Purchase price adjustment related to the purchase of other acquisitions/ VendEngine	$ 0

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.

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