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INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Intangible assets
Gross Carrying Amount	$ 102,615	$ 100,645
Acquisitions		1,970
Accumulated Amortization	(89,893)	(87,250)
Currency impact	(312)	(301)
Net Book Value	12,410	15,064
Amortization expense	2,643	3,532
Estimated future amortization expense
2022	2,110
2023	1,814
2024	1,495
2025	1,326
2026	1,201
Thereafter	4,464
Estimated future amortization expense	12,410
Customer Relationships
Intangible assets
Gross Carrying Amount	75,283	73,723
Acquisitions		1,560
Accumulated Amortization	(68,677)	(66,705)
Currency impact	(111)	(108)
Net Book Value	6,495	8,470
Noncompete Agreements
Intangible assets
Gross Carrying Amount	5,962	5,952
Acquisitions		10
Accumulated Amortization	(5,960)	(5,911)
Net Book Value	2	51
Software
Intangible assets
Gross Carrying Amount	1,660	1,500
Acquisitions		160
Accumulated Amortization	(1,534)	(1,511)
Net Book Value	126	149
Backlog
Intangible assets
Gross Carrying Amount	5,002	5,002
Accumulated Amortization	(4,981)	(4,981)
Currency impact	(21)	(21)
Databases
Intangible assets
Gross Carrying Amount	13,218	13,218
Accumulated Amortization	(7,371)	(6,852)
Currency impact	(180)	(172)
Net Book Value	$ 5,667	$ 6,194
Trademarks And Trade Names
Intangible assets
Estimated Useful Lives (in years)	5 years	5 years
Gross Carrying Amount	$ 1,490	$ 1,250
Acquisitions		240
Accumulated Amortization	(1,370)	(1,290)
Net Book Value	$ 120	$ 200
Minimum | Customer Relationships
Intangible assets
Estimated Useful Lives (in years)	2 years	2 years
Minimum | Noncompete Agreements
Intangible assets
Estimated Useful Lives (in years)	4 years	4 years
Minimum | Software
Intangible assets
Estimated Useful Lives (in years)	3 years	3 years
Minimum | Backlog
Intangible assets
Estimated Useful Lives (in years)	1 year	1 year
Minimum | Databases
Intangible assets
Estimated Useful Lives (in years)	4 years	4 years
Maximum | Customer Relationships
Intangible assets
Estimated Useful Lives (in years)	15 years	15 years
Maximum | Noncompete Agreements
Intangible assets
Estimated Useful Lives (in years)	7 years	7 years
Maximum | Software
Intangible assets
Estimated Useful Lives (in years)	4 years	4 years
Maximum | Backlog
Intangible assets
Estimated Useful Lives (in years)	2 years	2 years
Maximum | Databases
Intangible assets
Estimated Useful Lives (in years)	15 years	15 years

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The amount of acquired finite lived intangible assets acquired.

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