Restructuring Charges - Changes in 2014 Plan Restructuring Liabilities (Details) - 2014 Plan $ in Thousands	9 Months Ended
Sep. 30, 2016 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring liability, as of January 1, 2016	$ 2,781
Cash paid	(1,746)
Foreign exchange rate changes	40
Restructuring liability, as of September 30, 2016	1,075
Employee Severance and Termination
Restructuring Reserve [Roll Forward]
Restructuring liability, as of January 1, 2016	1,791
Cash paid	(1,746)
Foreign exchange rate changes	40
Restructuring liability, as of September 30, 2016	85
Professional Fees, Office Closures and Other
Restructuring Reserve [Roll Forward]
Restructuring liability, as of January 1, 2016	990
Cash paid	0
Foreign exchange rate changes	0
Restructuring liability, as of September 30, 2016	$ 990

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 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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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.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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Amount of gain (loss) from translating a restructuring reserve to the currency of the reporting entity from an amount denominated or measured in a different currency.

+ References

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)(2))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

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