SEGMENT REPORTING, ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Property and equipment, net	$ 104,316	$ 107,529
Goodwill	2,009,117	1,882,020	$ 1,611,535
Reconciliation of operating segment assets to total assets [Abstract]
Total assets	6,479,030	3,853,986
Reconciliation of operating segment liabilities to total liabilities [Abstract]
Total liabilities	1,254,709	448,393
North America [Member]
Segment Reporting Information [Line Items]
Goodwill	1,874,125	1,738,360	1,573,088
International [Member]
Segment Reporting Information [Line Items]
Goodwill	134,992	143,660	$ 38,447
Operating Segments [Member] | North America [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	101,324	103,383
Goodwill	1,874,125	1,738,360
Reconciliation of operating segment assets to total assets [Abstract]
Total assets	6,260,750	3,615,258
Reconciliation of operating segment liabilities to total liabilities [Abstract]
Total liabilities	1,208,740	402,759
Operating Segments [Member] | International [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	2,992	4,146
Goodwill	134,992	143,660
Reconciliation of operating segment assets to total assets [Abstract]
Total assets	218,280	238,728
Reconciliation of operating segment liabilities to total liabilities [Abstract]
Total liabilities	$ 45,969	$ 45,634