Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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GOODWILL (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
GOODWILL (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 24, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 1,882,020	$ 1,882,020	$ 1,611,535
Acquisitions, including measurement period adjustments			135,878	267,804
Effect of foreign currency translation			(8,781)	2,681
Goodwill, ending balance	$ 2,009,117		2,009,117	1,882,020
Goodwill	2,009,117	1,882,020	1,882,020	1,882,020
Cozy Services Ltd [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		53,000	53,000
Goodwill, ending balance				53,000
Goodwill increase (decrease)				(1,000)
Goodwill		53,000	53,000	53,000
Ten-X [Member]
Goodwill [Roll Forward]
Goodwill					$ 135,446
North America [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		1,738,360	1,738,360	1,573,088
Acquisitions, including measurement period adjustments			135,765	165,272
Effect of foreign currency translation				0
Goodwill, ending balance	1,874,125		1,874,125	1,738,360
Goodwill	1,874,125	1,738,360	1,874,125	1,738,360
North America [Member] \| Ten-X [Member]
Goodwill [Roll Forward]
Goodwill increase (decrease)	300
International [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		143,660	143,660	38,447
Acquisitions, including measurement period adjustments			113	102,532
Effect of foreign currency translation			(8,781)	2,681
Goodwill, ending balance	134,992		134,992	143,660
Goodwill	$ 134,992	143,660	$ 134,992	$ 143,660
International [Member] \| Ten-X [Member]
Goodwill [Roll Forward]
Goodwill increase (decrease)		$ 100