Annual report pursuant to Section 13 and 15(d)

Income Taxes - Domestic and foreign income taxes (Details)

v3.8.0.1
Income Taxes - Domestic and foreign income taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Domestic $ 29,792 $ 19,874 $ 17,860
Foreign (1,075) (3,507) (17,568)
Income before (benefit) provision for income taxes $ 28,717 $ 16,367 $ 292