Annual report pursuant to Section 13 and 15(d)

Income Taxes - Payment for Taxes (Details)

v3.8.0.1
Income Taxes - Payment for Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating Loss Carryforwards      
Cash paid for taxes $ 29,199 $ 16,981 $ 8
Domestic      
Operating Loss Carryforwards      
Cash paid for taxes 1,647 373 8
Foreign      
Operating Loss Carryforwards      
Cash paid for taxes $ 27,552 $ 16,608 $ 0