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Income Taxes - Reconciliation of the Beginning and Ending Amount of Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Beginning balance	$ 2,047	$ 1,708	$ 1,592
Increases/(decreases) for current year tax positions	357	242	116
Increases/(decreases) for prior year tax positions	21	97	0
Decreases as a result of expiration of statute of limitations	0	0	0
Ending balance	2,425	2,047	1,708
Gross unrecognized tax benefits	2,000	1,700
Unrecognized interest or penalties	$ 0	$ 0	$ 0
Minimum [Member]
Income Tax Examination [Line Items]
Open Tax Year	2001

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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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 15
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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount of expense 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.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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