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GOODWILL AND LONG-LIVED ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 102,223	$ 100,738
Accumulated Amortization	71,258	65,446
Net Carrying Value	30,965	35,292
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	16,200	16,200
Accumulated Amortization	16,200	16,200
Net Carrying Value	0	0
Merchant relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	21,668	22,193
Accumulated Amortization	10,557	8,268
Net Carrying Value	11,111	13,925
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,491	9,558
Accumulated Amortization	7,771	7,369
Net Carrying Value	1,720	2,189
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2,319	3,651
Accumulated Amortization	1,906	2,685
Net Carrying Value	413	966
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	25,809	23,021
Accumulated Amortization	19,850	18,167
Net Carrying Value	5,959	4,854
Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	26,736	26,115
Accumulated Amortization	14,974	12,757
Net Carrying Value	$ 11,762	$ 13,358

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
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