Geographic and Group Information (Long-Lived Assets Attributable To Geographic Areas) (Details) - USD ($) $ in Thousands	Apr. 01, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 104,815	$ 105,365
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	89,158	89,199
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	15,060	15,584
Other (Australia, Canada, India and Uruguay) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 597	$ 582