Operating Segments and Related Information (Details 6) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 988,082	$ 994,881
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	636,965	623,522
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	338,670	319,661
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 12,447	$ 51,698