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BUSINESS COMBINATION - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended
	Mar. 31, 2021	Jan. 25, 2021	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
Business Acquisition [Line Items]
Contingent consideration in connection with the acquisition				$ 3,596	$ 0
Sofdesk
Business Acquisition [Line Items]
Voting interests acquired		100.00%
Purchase price		$ 31,988
Contingency payable, maximum		3,700
Contingent consideration in connection with the acquisition		3,500
Consideration transferred for business acquisition		$ 35,488
Acquisition costs			$ 300	2,000
DIN's
Business Acquisition [Line Items]
Purchase price	$ 24,800
Acquisition costs			$ 500	$ 1,900
Timing of monthly installment payments	1 year
DIN's | Additional Consideration, Equal Monthly Installments
Business Acquisition [Line Items]
Contingency payable, maximum	$ 5,000
Timing of monthly installment payments	1 year
DIN's | Additional Consideration, Payable One Year Anniversary
Business Acquisition [Line Items]
Contingency payable, maximum	$ 5,000

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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