SALE OF BUSINESS (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018
Hospitality [Member]
Segment Reporting Information [Line Items]
Proceeds from Divestiture of Businesses		$ 16,500
Divestiture of business selling costs		1,500
Escrow Deposits Related to Property Sales	$ 1,700	1,700
Proceeds from Divesture of Business, Receivable, Working Capital	200	200
Net Cash Provided by (Used in) Discontinued Operations		14,000
Proceeds from Divesture of Business, Receivable, Working Capital		$ (800)
Gain (Loss) on Disposition of Business	500
Escrow Deposit Disbursements Related to Property Acquisition	700
Rigzone [Member]
Segment Reporting Information [Line Items]
Proceeds from Divestiture of Businesses			$ 4,200
Divestiture of business selling costs			600
Escrow Deposits Related to Property Sales			400
Proceeds from Divesture of Business, Receivable, Working Capital			4,600
Disposal Group, Including Discontinued Operation, Deferred Revenue			$ 1,200
Health eCareers [Member]
Segment Reporting Information [Line Items]
Proceeds from Divestiture of Businesses				$ 15,000
Divestiture of business selling costs				$ 600
Escrow Deposits Related to Property Sales	$ 1,500