Operating Segments and Related Information Operating Segments and Related Information (Details 5) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 985,838	$ 989,664
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	591,099	583,008
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	343,162	353,695
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 51,577	$ 52,961