Segment Reporting (Geographic Areas) (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,263,800	$ 1,308,675
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,129,623	1,164,322
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	115,887	126,341
International, other
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 18,290	$ 18,012