Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Increase in deferred tax asset valuation allowance	$ 1,900	$ 1,200	$ 5,200
Interest and penalties recognize in income tax expense	35	24	$ (47)
Interest and penalties recognized on the balance sheet	292	257
Unrecognized tax benefits that would impact effective tax rate	400	$ 400
India
Income Taxes [Line Items]
Deferred tax liability from undistributed foreign earnings	$ 100