PROPERTY, EQUIPMENT AND SOFTWARE - (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, equipment and software	$ 77,683		$ 74,256
Less: accumulated depreciation	(52,286)		(49,023)
Property, equipment and software, net	25,397		25,233
Depreciation expense	2,200	$ 2,100
Computer software
Property, Plant and Equipment [Line Items]
Property, equipment and software	54,939		52,715
Equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software	12,874		12,255
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and software	6,835		6,467
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, equipment and software	$ 3,035		$ 2,819

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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