Other Current Assets Components of Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Value added tax receivables	$ 15,360	$ 18,031
Service contracts	2,155	2,013
Derivatives (foreign currency forward contracts)	1,979	4,143
Prepaid inventory	1,099	158
Prepaid debt fees	901	869
Recoverable income taxes	704	367
Prepaid insurance	444	2,538
Prepaid and other current assets	8,955	6,313
Other current assets	$ 31,597	$ 34,432