Operating Segments and Related Information (Details 5) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 1,387,975	$ 1,401,806
United States
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	720,885	797,816
Europe [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	446,704	343,208
Other Geographic Region [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 220,386	$ 260,782