Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Unrecognized Tax Benefits Excluding Impact of Interest and Penalties (Details)

v3.8.0.1
Income Taxes - Reconciliation of Unrecognized Tax Benefits Excluding Impact of Interest and Penalties (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]  
Unrecognized tax benefits, beginning balance $ 5,655
Currency translation adjustment 796
Unrecognized tax benefits, ending balance $ 6,451