DISCONTINUED OPERATIONS - Other (Details) - USD ($) $ in Thousands	7 Months Ended	8 Months Ended	12 Months Ended
Dec. 31, 2019	Sep. 03, 2019	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Decrease in accounts receivable	$ 11,575	$ 1,899	$ 12,021	$ 2,031
Deferred revenue	3,586	(1,395)	$ 1,550	(845)
Business Processing Outsourcing \| Discontinued Operations, Disposed of by Means Other than Sale, Abandonment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations	73	(696)		36
Decrease in accounts receivable	0	2,808		43
Deferred revenue	$ 0	$ (64)		$ 0

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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+ Details