The number of positions eliminated during the period as a result of restructuring activities.

No definition available.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 10
-Section 45
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

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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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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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Restructuring Charges - Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($) employee	Jun. 30, 2018 employee	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Restructuring Accruals
Restructuring charges			$ 8,556	$ 11,851	$ 5,640
Non-cash charges related to share based compensation			16,074	24,396	$ 15,741
Reduce excess capacity
Restructuring Accruals
Number of employees terminated \| employee		40
Reduce costs
Restructuring Accruals
Number of employees terminated \| employee	35
Restructuring
Restructuring Accruals
Non-cash charges related to share based compensation			1,200	$ 1,900
Personnel severance and related costs \| Reduce excess capacity
Restructuring Accruals
Restructuring charges			$ 2,800
Personnel severance and related costs \| Reduce costs
Restructuring Accruals
Restructuring charges	$ 1,200