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STOCK-BASED COMPENSATION - Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Stock-based compensation expense
Stock-based compensation	$ 13,547	$ 11,890	$ 24,088	$ 21,376
Cost of revenue
Stock-based compensation expense
Stock-based compensation	1,738	1,743	3,151	3,289
Selling, general and administrative
Stock-based compensation expense
Stock-based compensation	$ 11,809	$ 10,147	$ 20,937	$ 18,087

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
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-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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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