Schedule of Tangible Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	$ 2,471,609	$ 2,542,911
UNITED STATES
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	1,456,104	1,467,701
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	300,143	330,113
Other countries
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	379,591	404,102
GERMANY
Revenues from External Customers and Long-Lived Assets
Long-Lived Assets	$ 335,771	$ 340,995