Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

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Amount of expected cost remaining for the specified restructuring cost.

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

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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The provision for the estimated restructuring costs.

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Liabilities - Restructuring accruals general information (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) employee
Restructuring accruals rollforward
Balance at the beginning of the period	$ 1,796
Provision	7,897
Payments	(7,800)
Balance at the end of the period	1,893		$ 1,796
Non-cash charges related to share based compensation	19,976	$ 12,133
Restructuring
Restructuring accruals rollforward
Non-cash charges related to share based compensation	1,700
Minimum
Restructuring accruals
Additional restructuring costs expected over the next few quarters	1,000
Maximum
Restructuring accruals
Additional restructuring costs expected over the next few quarters	5,000
Personnel Severance and Related Costs
Restructuring accruals rollforward
Balance at the beginning of the period	1,796
Provision	3,628
Payments	(3,531)
Balance at the end of the period	1,893		$ 1,796
Personnel Severance and Related Costs \| Streamline operations, enhance efficiency and reduce costs
Restructuring accruals
Number of employees terminated \| employee			75
Facility Closing Costs
Restructuring accruals rollforward
Provision	4,269
Payments	$ (4,269)