Long-lived Tangible Assets - Long-Lived Tangible Assets by Geographic Area (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Long-lived Assets from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	$ 101,292	$ 110,558
United States
Long-lived Assets from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	17,976	19,938
People's Republic of China (PRC)
Long-lived Assets from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	61,089	67,625
Mexico
Long-lived Assets from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	16,960	16,644
All other countries
Long-lived Assets from External Customers and Long-Lived Assets [Line Items]
Long-lived tangible assets	$ 5,267	$ 6,351