DISCONTINUED OPERATIONS - Operating Results of Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations	$ 0	$ 3,498
Gain on sale of discontinued operations	0	94,293
Income tax expense	0	(25,499)
Gain on discontinued operations, net of taxes	$ 0	72,292
Discontinued Operations, Disposed of by Sale | Workspace Management Software Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		24,619
Income from discontinued operations		3,498
Gain on sale of discontinued operations		94,293
Income tax expense		(25,499)
Gain on discontinued operations, net of taxes		$ 72,292