Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax benefit	$ 166	$ 294
Effective tax rate	22.00%	168.00%
Reserve reversal due to favorable foreign tax ruling		$ 200
Unrecognized tax benefits	$ 5,700
Unrecognized tax benefits that would impact effective rate	5,300
Accrued interest and penalties	$ 600		$ 500

Effective Income Tax Rate Reconciliation, Recognition of Previously Unrecognized Tax Benefits, Amount

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 9
-Subparagraph (a),(b)
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Amount of unrecognized tax benefits.

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- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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-Name Accounting Standards Codification
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