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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 59,608	$ 60,616
Accumulated Amortization	35,298	30,465
Net Carrying Value	24,310	30,151
Merchant relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	19,976	20,208
Accumulated Amortization	12,554	9,236
Net Carrying Value	7,422	10,972
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,604	9,651
Accumulated Amortization	8,215	7,921
Net Carrying Value	1,389	1,730
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	540	2,121
Accumulated Amortization	540	1,863
Net Carrying Value	0	258
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	12,455	10,813
Accumulated Amortization	5,712	4,697
Net Carrying Value	6,743	6,116
Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	17,033	17,823
Accumulated Amortization	8,277	6,748
Net Carrying Value	$ 8,756	$ 11,075

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