FAIR VALUE (NARRATIVE) (Details) $ in Thousands			3 Months Ended			12 Months Ended
	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Oct. 26, 2019 USD ($)	Apr. 30, 2018 USD ($)	Dec. 31, 2016 USD ($)
Business acquisitions, Contingent Consideration [Line Items]
Average interest rate on annual borrowings						3.40%	3.10%
Purchase Price Payable Payments During Period							$ (399)
Business Combination Contingent Consideration Liability		$ 2,363				$ 6,134	2,363	$ 399
SCS
Business acquisitions, Contingent Consideration [Line Items]
Business Combination Contingent Consideration Liability		2,363				0	2,363	0		$ 4,100
Increase (decrease) in contingent consideration payable	$ 2,500	300		$ 210
SCS | Discount Rate
Business acquisitions, Contingent Consideration [Line Items]
Business combination contingent consideration measurement input										4.7
FCR
Business acquisitions, Contingent Consideration [Line Items]
Business Combination Contingent Consideration Liability		0				6,134	0		$ 10,900
Increase (decrease) in contingent consideration payable			$ 400
FCR | Discount Rate
Business acquisitions, Contingent Consideration [Line Items]
Business combination contingent consideration measurement input									16.7
Welltok
Business acquisitions, Contingent Consideration [Line Items]
Purchase Price Payable Payments During Period					$ 399		(399)	851
Business Combination Contingent Consideration Liability		$ 0				$ 0	$ 0	$ 399			$ 1,250