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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 1,840	$ 1,840	$ 1,623
Amounts of tax benefits that would affect effective tax rate if recognized	1,409	1,409	1,225
Income tax accrued interest	159	159	$ 108
Statute of limitations		226
Accounting Standards Update 2016-09 [Member]
Income Tax Contingency [Line Items]
Reduction in income tax expense from adoption of ASU No. 2016-09 - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting	$ 0	$ 278

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Reduction in income tax expense from adoption of ASU No. 2016-09 – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
-Paragraph 15
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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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