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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill	$ 0	$ 35,060,000
Amortization of intangible assets	9,547,000	11,765,000
Amortization expenses	1,604,000	$ 1,994,000
Human Capital Management
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill	$ 0
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life (in years)	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life (in years)	9 years

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of expense for allocation of cost of intangible asset over its useful life directly used in production of good and rendering of service.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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