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PROPERTY, EQUIPMENT AND SOFTWARE, NET - Depreciation and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Depreciation and amortization of property, equipment and software	$ 77,792	$ 91,410	$ 101,330
Selling, general and administrative
Property, Plant and Equipment [Line Items]
Depreciation and amortization of property, equipment and software	39,915	56,027	64,761
Service | Cost of revenue
Property, Plant and Equipment [Line Items]
Depreciation and amortization of property, equipment and software	28,443	28,917	28,102
Product | Cost of revenue
Property, Plant and Equipment [Line Items]
Depreciation and amortization of property, equipment and software	$ 9,434	$ 6,466	$ 8,467

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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