STOCK PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Share-Based Compensation
Stock-based compensation expense	$ 8,490	$ 7,517
Compensation expense from stock options, employees	6,856	6,309
Compensation expense from stock options, non-employee awards	274	997
Restricted Stock or Unit Expense	1,085	0
Compensation expense from employee stock purchase plan	275	211
Stock-based compensation	$ 8,490	7,517
Shares issued under employee stock purchase plan (shares)	0
Cost of goods sold
Share-Based Compensation
Stock-based compensation expense	$ 1,549	1,103
Research and development
Share-Based Compensation
Stock-based compensation expense	893	1,510
Selling, general and administrative
Share-Based Compensation
Stock-based compensation expense	$ 6,048	$ 4,904

Compensation expense from employee stock purchase plan

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- Definition

Compensation expense from stock options (employee and board of director awards)

+ References

No definition available.

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- Definition

Compensation expense from stock options, non-employee awards

+ References

No definition available.

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- 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Name Staff Accounting Bulletin (SAB)
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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.

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No definition available.

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- Definition

The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 29, 30
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