Schedule of Tangible Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	$ 2,601,827	$ 2,542,911	$ 1,220,162
UNITED STATES
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	1,419,113	1,467,701	620,125
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	315,333	330,113	165,145
Other countries
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	507,197	404,102	217,416
GERMANY
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	$ 360,184	$ 340,995	$ 217,476