Restructuring Charges Restructuring Table $ in Thousands	6 Months Ended
Jun. 30, 2018 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 2,029
Restructuring Charges	2,505
Payments for Restructuring	(2,962)
Restructuring Reserve, Accrual Adjustment	(4)
Restructuring Reserve	1,568
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	915
Restructuring Charges	2,345
Payments for Restructuring	(2,611)
Restructuring Reserve, Accrual Adjustment	0
Restructuring Reserve	649
Special Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	1,114
Restructuring Charges	0
Payments for Restructuring	(191)
Restructuring Reserve, Accrual Adjustment	(4)
Restructuring Reserve	919
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	0
Restructuring Charges	160
Payments for Restructuring	(160)
Restructuring Reserve, Accrual Adjustment	0
Restructuring Reserve	$ 0

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
-Subparagraph (b)(2)
-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
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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

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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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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