Income Taxes - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Tax Contingency [Line Items]
Discrete tax benefit	$ 31,529	$ 3,435
Foreign Tax Authority
Income Tax Contingency [Line Items]
Accrued liabilities related to tax service on revenue	2,200
Reserve	168
Discrete tax benefit	8,200
Foreign Tax Authority | Asia Pacific
Income Tax Contingency [Line Items]
Discrete period tax related to beginning of year	$ 1,600