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Restructuring Activities (Details Textuals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring charges	$ 1,865	$ 6,546	$ 1,865	$ 6,546
Operating Leases, Rent Expense, Sublease Rentals	600	500	900	1,000
Stock Based Compensation [Member]
Restructuring charges		4,400		4,400
Employee Severance, Excluding Share-based Compensation [Member]
Restructuring charges		$ 1,600		$ 1,600
Lease Related Impairment [Member]
Restructuring charges	$ 700		$ 700

X

- Definition

The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
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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

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