GOODWILL AND OTHER INTANGIBLES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill [Roll Forward]
Carrying amount, December 31, 2020			$ 88,276
Goodwill attributable to acquisitions (subject to change)			34,282
Foreign currency adjustments			(2,974)
Carrying amount, September 30, 2021	$ 119,584		119,584
Finite-Lived Intangible Assets, Net [Abstract]
Accumulated amortization	(12,861)		(12,861)		$ (8,237)
Net carrying amount	51,419		51,419
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	7,915		7,915
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	72,195		72,195		64,229
Accumulated amortization	(12,861)		(12,861)		(8,237)
Net intangible assets	59,334		59,334		55,992
Amortization expense	1,567	$ 1,502	$ 4,623	$ 3,556
Remaining weighted average amortization period for intangible assets			7 years 8 months 12 days
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2021 (remaining)	1,858		$ 1,858
2022	7,362		7,362
2023	6,999		6,999
2024	6,571		6,571
2025	6,516		6,516
Thereafter	22,113		22,113
Net carrying amount	51,419		51,419
Indefinite-lived intangible assets	7,915		7,915
Net intangible assets	59,334		59,334		55,992
Trade name
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	7,915		7,915		8,374
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Indefinite-lived intangible assets	7,915		7,915		8,374
Customer relationships and other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	48,412		48,412		46,989
Accumulated amortization	(10,045)		(10,045)		(6,436)
Net carrying amount	38,367		38,367		40,553
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated amortization	(10,045)		(10,045)		(6,436)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	38,367		38,367		40,553
Developed technology
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	15,643		15,643		8,669
Accumulated amortization	(2,665)		(2,665)		(1,696)
Net carrying amount	12,978		12,978		6,973
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated amortization	(2,665)		(2,665)		(1,696)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	12,978		12,978		6,973
Trade name
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	225		225		197
Accumulated amortization	(151)		(151)		(105)
Net carrying amount	74		74		92
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated amortization	(151)		(151)		(105)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	74		74		$ 92
Operating Segments | North America
Goodwill [Roll Forward]
Carrying amount, December 31, 2020			35,414
Goodwill attributable to acquisitions (subject to change)			29,720
Foreign currency adjustments			91
Carrying amount, September 30, 2021	65,225		65,225
Operating Segments | International
Goodwill [Roll Forward]
Carrying amount, December 31, 2020			52,862
Goodwill attributable to acquisitions (subject to change)			4,562
Foreign currency adjustments			(3,065)
Carrying amount, September 30, 2021	$ 54,359		$ 54,359