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GOODWILL AND ACQUIRED INTANGIBLES - Other Intangible Assets Subject to Amortization (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2023	Jun. 30, 2022	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount (1)	$ 92,300		$ 154,500
Accumulated Amortization	(42,384)		(44,732)
Net	49,916		53,373
Goodwill, Impaired, Accumulated Impairment Loss	(396,242)	$ (83,100)	(313,100)
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount (1)	2,315		3,500
Accumulated Amortization	(1,836)		(1,744)
Net	$ 479		571
Weighted Average Remaining Useful Life	7 months 6 days	1 year 4 months 24 days
Goodwill, Impaired, Accumulated Impairment Loss			(1,185)
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount (1)	$ 64,070		91,700
Accumulated Amortization	(27,174)		(24,882)
Net	$ 36,896		39,188
Weighted Average Remaining Useful Life	1 year	3 years 7 months 6 days
Goodwill, Impaired, Accumulated Impairment Loss			(27,630)
Merchant Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount (1)	$ 25,915		40,300
Accumulated Amortization	(13,374)		(12,301)
Net	$ 12,541		13,614
Weighted Average Remaining Useful Life	1 year 3 months 18 days	1 year 8 months 12 days
Goodwill, Impaired, Accumulated Impairment Loss			(14,385)
Partner Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount (1)			2,000
Accumulated Amortization			(450)
Net			0
Weighted Average Remaining Useful Life		0 years
Goodwill, Impaired, Accumulated Impairment Loss			(1,550)
Card-Linked Subscriber User Base [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount (1)			17,000
Accumulated Amortization			(5,355)
Net			0
Weighted Average Remaining Useful Life		0 years
Goodwill, Impaired, Accumulated Impairment Loss			$ (11,645)

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