Other Current Assets Components of Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Tax receivables principally value added taxes	$ 23,188	$ 16,049
Receivable due from information technology provider	2,402	6,262
Prepaid inventory	1,392	684
Derivatives (foreign currency forward exchange contracts)	599	838
Service contracts	446	2,013
Prepaid insurance	341	2,918
Deferred financing fees	209	207
Prepaid social charges	95	1,216
Recoverable income taxes	50	297
Prepaid and other current assets	8,913	7,425
Other current assets	$ 37,635	$ 37,909