Annual report pursuant to Section 13 and 15(d)

Reportable Segments - Sales by Geography (Details)

v3.20.4
Reportable Segments - Sales by Geography (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets                      
Sales $ 281,505 $ 275,149 $ 254,896 $ 295,813 $ 283,535 $ 307,271 $ 311,641 $ 297,468 $ 1,107,363 $ 1,199,914 $ 1,228,926
United States                      
Revenues from External Customers and Long-Lived Assets                      
Sales                 655,015 735,752 740,190
Netherlands                      
Revenues from External Customers and Long-Lived Assets                      
Sales                 108,338 117,211 127,803
United Kingdom                      
Revenues from External Customers and Long-Lived Assets                      
Sales                 107,539 99,048 101,277
Other foreign countries                      
Revenues from External Customers and Long-Lived Assets                      
Sales                 $ 236,471 $ 247,903 $ 259,656