Operating Segments and Related Information (Details 6) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 1,408,914	$ 1,409,806
United States
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	686,546	676,007
Europe [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	480,653	490,089
Other Geographic Region [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 241,715	$ 243,710