BUSINESS COMBINATIONS - Identifiable Intangible Assets Acquired (Details) - USD ($) $ in Thousands		6 Months Ended
	Mar. 05, 2021	Jun. 30, 2021
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life (in years)		2 years 7 months 6 days
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life (in years)		5 years 9 months 18 days
Merchant relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life (in years)		4 years 8 months 12 days
Partner relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life (in years)		6 years 8 months 12 days
Card-linked subscriber user base
Acquired Finite-Lived Intangible Assets [Line Items]
Useful life (in years)		4 years 8 months 12 days
Dosh Holdings, Inc. | Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 2,500
Useful life (in years)	3 years
Dosh Holdings, Inc. | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 36,000
Useful life (in years)	6 years
Dosh Holdings, Inc. | Merchant relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 21,000
Useful life (in years)	5 years
Dosh Holdings, Inc. | Partner relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 2,000
Useful life (in years)	7 years
Dosh Holdings, Inc. | Card-linked subscriber user base
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 17,000
Useful life (in years)	5 years