Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Income Before Income Taxes (Details)

v3.8.0.1
Income Taxes - Components of Income Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Domestic $ (2,965) $ (3,106) $ (7,820)
Foreign 46,391 67,183 55,613
Income before income taxes $ 43,426 $ 64,077 $ 47,793